102021000021221 has 16 divisors (see below), whose sum is σ = 102965858856000. Its totient is φ = 101079680663808.

The previous prime is 102021000021191. The next prime is 102021000021223. The reversal of 102021000021221 is 122120000120201.

It is a cyclic number.

It is not a de Polignac number, because 102021000021221 - 2¹⁰ = 102021000020197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021000021196 and 102021000021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021000021223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440459786 + ... + 440691348.

It is an arithmetic number, because the mean of its divisors is an integer number (6435366178500).

Almost surely, 2^{102021000021221} is an apocalyptic number.

It is an amenable number.

102021000021221 is a deficient number, since it is larger than the sum of its proper divisors (944858834779).

102021000021221 is a wasteful number, since it uses less digits than its factorization.

102021000021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239188.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102021000021221 its reverse (122120000120201), we get a palindrome (224141000141422).

The spelling of 102021000021221 in words is "one hundred two trillion, twenty-one billion, twenty-one thousand, two hundred twenty-one".