21122020001020 has 96 divisors (see below), whose sum is σ = 45396077606208. Its totient is φ = 8253350019072.

The previous prime is 21122020001011. The next prime is 21122020001057. The reversal of 21122020001020 is 2010002022112.

It is a happy number.

It is a super-2 number, since 2×21122020001020² (a number of 27 digits) contains 22 as substring.

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, 63798952 + ... + 64129168.

It is an arithmetic number, because the mean of its divisors is an integer number (472875808398).

Almost surely, 2^{21122020001020} is an apocalyptic number.

21122020001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122020001020 is an abundant number, since it is smaller than the sum of its proper divisors (24274057605188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122020001020 is a wasteful number, since it uses less digits than its factorization.

21122020001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330719 (or 330717 counting only the distinct ones).

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

Adding to 21122020001020 its reverse (2010002022112), we get a palindrome (23132022023132).

The spelling of 21122020001020 in words is "twenty-one trillion, one hundred twenty-two billion, twenty million, one thousand, twenty".