21020120001022 has 64 divisors (see below), whose sum is σ = 33275206609920. Its totient is φ = 9939454272000.

The previous prime is 21020120001011. The next prime is 21020120001043. The reversal of 21020120001022 is 22010002102012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21020120000993 and 21020120001011.

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, 5455518448 + ... + 5455522300.

It is an arithmetic number, because the mean of its divisors is an integer number (519925103280).

Almost surely, 2^{21020120001022} is an apocalyptic number.

21020120001022 is a deficient number, since it is larger than the sum of its proper divisors (12255086608898).

21020120001022 is a wasteful number, since it uses less digits than its factorization.

21020120001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7529.

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

Adding to 21020120001022 its reverse (22010002102012), we get a palindrome (43030122103034).

The spelling of 21020120001022 in words is "twenty-one trillion, twenty billion, one hundred twenty million, one thousand, twenty-two".