21022012122101 has 32 divisors (see below), whose sum is σ = 21335952718080. Its totient is φ = 20711397095424.

The previous prime is 21022012122091. The next prime is 21022012122113. The reversal of 21022012122101 is 10122121022012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022012122101 is a prime.

It is a super-2 number, since 2×21022012122101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022012122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022012122121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11128644965 + ... + 11128646853.

It is an arithmetic number, because the mean of its divisors is an integer number (666748522440).

Almost surely, 2^{21022012122101} is an apocalyptic number.

It is an amenable number.

21022012122101 is a deficient number, since it is larger than the sum of its proper divisors (313940595979).

21022012122101 is a wasteful number, since it uses less digits than its factorization.

21022012122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21022012122101 its reverse (10122121022012), we get a palindrome (31144133144113).

The spelling of 21022012122101 in words is "twenty-one trillion, twenty-two billion, twelve million, one hundred twenty-two thousand, one hundred one".