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1022022121 = 6116754461
BaseRepresentation
bin111100111010101…
…101000111101001
32122020010002210011
4330322231013221
54043114201441
6245225251521
734220021221
oct7472550751
92566102704
101022022121
114849a538a
12246333ba1
1313397ab23
1499a41081
155ead1581
hex3cead1e9

1022022121 has 4 divisors (see below), whose sum is σ = 1038776644. Its totient is φ = 1005267600.

The previous prime is 1022022107. The next prime is 1022022143. The reversal of 1022022121 is 1212202201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 211993600 + 810028521 = 14560^2 + 28461^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022022121 - 27 = 1022021993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022022101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8377170 + ... + 8377291.

It is an arithmetic number, because the mean of its divisors is an integer number (259694161).

Almost surely, 21022022121 is an apocalyptic number.

It is an amenable number.

1022022121 is a deficient number, since it is larger than the sum of its proper divisors (16754523).

1022022121 is an equidigital number, since it uses as much as digits as its factorization.

1022022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16754522.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1022022121 is about 31969.0807030793. The cubic root of 1022022121 is about 1007.2874707641.

Adding to 1022022121 its reverse (1212202201), we get a palindrome (2234224322).

The spelling of 1022022121 in words is "one billion, twenty-two million, twenty-two thousand, one hundred twenty-one".

Divisors: 1 61 16754461 1022022121