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102022021 = 127803323
BaseRepresentation
bin1100001010010…
…11101110000101
321002222020220101
412011023232011
5202104201041
614042404101
72346113203
oct605135605
9232866811
10102022021
1152652722
122a200631
13181a0c7a
14d79a073
158e53b31
hex614bb85

102022021 has 4 divisors (see below), whose sum is σ = 102825472. Its totient is φ = 101218572.

The previous prime is 102022009. The next prime is 102022027. The reversal of 102022021 is 120220201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102022021 - 25 = 102021989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021989 and 102022007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102022027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401535 + ... + 401788.

It is an arithmetic number, because the mean of its divisors is an integer number (25706368).

Almost surely, 2102022021 is an apocalyptic number.

It is an amenable number.

102022021 is a deficient number, since it is larger than the sum of its proper divisors (803451).

102022021 is an equidigital number, since it uses as much as digits as its factorization.

102022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803450.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 102022021 is about 10100.5950814791. The cubic root of 102022021 is about 467.2664943870.

Adding to 102022021 its reverse (120220201), we get a palindrome (222242222).

The spelling of 102022021 in words is "one hundred two million, twenty-two thousand, twenty-one".

Divisors: 1 127 803323 102022021