202121100021022 has 64 divisors (see below), whose sum is σ = 389460007004544. Its totient is φ = 76537869557760.

The previous prime is 202121100020893. The next prime is 202121100021067. The reversal of 202121100021022 is 220120001121202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 202121100020987 and 202121100021005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255139603 + ... + 255930574.

It is an arithmetic number, because the mean of its divisors is an integer number (6085312609446).

Almost surely, 2^{202121100021022} is an apocalyptic number.

202121100021022 is a deficient number, since it is larger than the sum of its proper divisors (187338906983522).

202121100021022 is a wasteful number, since it uses less digits than its factorization.

202121100021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511070293.

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

Adding to 202121100021022 its reverse (220120001121202), we get a palindrome (422241101142224).

The spelling of 202121100021022 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred million, twenty-one thousand, twenty-two".