202021022102021 has 16 divisors (see below), whose sum is σ = 221392448164800. Its totient is φ = 183488203976448.

The previous prime is 202021022101993. The next prime is 202021022102027. The reversal of 202021022102021 is 120201220120202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202021022102021 - 2⁴² = 197622975590917 is a prime.

It is a super-2 number, since 2×202021022102021² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021022102027) 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, 102556175 + ... + 104507468.

It is an arithmetic number, because the mean of its divisors is an integer number (13837028010300).

Almost surely, 2^{202021022102021} is an apocalyptic number.

It is an amenable number.

202021022102021 is a deficient number, since it is larger than the sum of its proper divisors (19371426062779).

202021022102021 is a wasteful number, since it uses less digits than its factorization.

202021022102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207065668.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202021022102021 its reverse (120201220120202), we get a palindrome (322222242222223).

The spelling of 202021022102021 in words is "two hundred two trillion, twenty-one billion, twenty-two million, one hundred two thousand, twenty-one".