21122020012031 has 8 divisors (see below), whose sum is σ = 21136970978304. Its totient is φ = 21107069537400.

The previous prime is 21122020012019. The next prime is 21122020012057. The reversal of 21122020012031 is 13021002022112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21122020012031 - 2¹⁴ = 21122019995647 is a prime.

It is a super-2 number, since 2×21122020012031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122020012001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150346886 + ... + 150487308.

It is an arithmetic number, because the mean of its divisors is an integer number (2642121372288).

Almost surely, 2^{21122020012031} is an apocalyptic number.

21122020012031 is a deficient number, since it is larger than the sum of its proper divisors (14950966273).

21122020012031 is a wasteful number, since it uses less digits than its factorization.

21122020012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245821.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21122020012031 its reverse (13021002022112), we get a palindrome (34143022034143).

The spelling of 21122020012031 in words is "twenty-one trillion, one hundred twenty-two billion, twenty million, twelve thousand, thirty-one".