102221122021 has 4 divisors (see below), whose sum is σ = 102229156512. Its totient is φ = 102213087532.

The previous prime is 102221122013. The next prime is 102221122027. The reversal of 102221122021 is 120221122201.

It is a happy number.

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 102221122021 - 2³ = 102221122013 is a prime.

It is a super-2 number, since 2×102221122021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102221121986 and 102221122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221122027) 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, 3998131 + ... + 4023616.

It is an arithmetic number, because the mean of its divisors is an integer number (25557289128).

Almost surely, 2^102221122021 is an apocalyptic number.

It is an amenable number.

102221122021 is a deficient number, since it is larger than the sum of its proper divisors (8034491).

102221122021 is an equidigital number, since it uses as much as digits as its factorization.

102221122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8034490.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102221122021 its reverse (120221122201), we get a palindrome (222442244222).

The spelling of 102221122021 in words is "one hundred two billion, two hundred twenty-one million, one hundred twenty-two thousand, twenty-one".