21022122013020 has 144 divisors (see below), whose sum is σ = 63809125380000. Its totient is φ = 5602206468096.

The previous prime is 21022122013003. The next prime is 21022122013031. The reversal of 21022122013020 is 2031022122012.

21022122013020 is a `hidden beast` number, since 210 + 221 + 2 + 201 + 30 + 2 + 0 = 666.

It is a super-2 number, since 2×21022122013020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21022122012984 and 21022122013002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2912050971 + ... + 2912058189.

It is an arithmetic number, because the mean of its divisors is an integer number (443118926250).

Almost surely, 2^{21022122013020} is an apocalyptic number.

21022122013020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022122013020 is an abundant number, since it is smaller than the sum of its proper divisors (42787003366980).

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

21022122013020 is a wasteful number, since it uses less digits than its factorization.

21022122013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15652 (or 15647 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21022122013020 its reverse (2031022122012), we get a palindrome (23053144135032).

The spelling of 21022122013020 in words is "twenty-one trillion, twenty-two billion, one hundred twenty-two million, thirteen thousand, twenty".