21122122020112 has 10 divisors (see below), whose sum is σ = 40924111413998. Its totient is φ = 10561061010048.

The previous prime is 21122122020089. The next prime is 21122122020119. The reversal of 21122122020112 is 21102022122112.

It can be written as a sum of positive squares in only one way, i.e., 20985780888576 + 136341131536 = 4581024^2 + 369244^2 .

It is a super-2 number, since 2×21122122020112² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122122020112.

It is not an unprimeable number, because it can be changed into a prime (21122122020119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660066313113 + ... + 660066313144.

Almost surely, 2^{21122122020112} is an apocalyptic number.

It is an amenable number.

21122122020112 is a deficient number, since it is larger than the sum of its proper divisors (19801989393886).

21122122020112 is a wasteful number, since it uses less digits than its factorization.

21122122020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320132626265 (or 1320132626259 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122122020112 its reverse (21102022122112), we get a palindrome (42224144142224).

The spelling of 21122122020112 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-two million, twenty thousand, one hundred twelve".