21122020112001 has 16 divisors (see below), whose sum is σ = 28272415573248. Its totient is φ = 14026544096400.

The previous prime is 21122020111961. The next prime is 21122020112009. The reversal of 21122020112001 is 10021102022112.

It is not a de Polignac number, because 21122020112001 - 2²² = 21122015917697 is a prime.

It is a super-2 number, since 2×21122020112001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122020112009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5852215 + ... + 8745996.

It is an arithmetic number, because the mean of its divisors is an integer number (1767025973328).

Almost surely, 2^{21122020112001} is an apocalyptic number.

It is an amenable number.

21122020112001 is a deficient number, since it is larger than the sum of its proper divisors (7150395461247).

21122020112001 is a wasteful number, since it uses less digits than its factorization.

21122020112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14600092.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21122020112001 its reverse (10021102022112), we get a palindrome (31143122134113).

The spelling of 21122020112001 in words is "twenty-one trillion, one hundred twenty-two billion, twenty million, one hundred twelve thousand, one".