21122022122112 has 128 divisors (see below), whose sum is σ = 62532302702400. Its totient is φ = 6277752668160.

The previous prime is 21122022122101. The next prime is 21122022122147. The reversal of 21122022122112 is 21122122022112.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×21122022122112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85023439 + ... + 85271502.

Almost surely, 2^{21122022122112} is an apocalyptic number.

It is an amenable number.

21122022122112 is an abundant number, since it is smaller than the sum of its proper divisors (41410280580288).

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

21122022122112 is a wasteful number, since it uses less digits than its factorization.

21122022122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170294994 (or 170294982 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21122022122112 its reverse (21122122022112), we get a palindrome (42244144144224).

The spelling of 21122022122112 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-two million, one hundred twenty-two thousand, one hundred twelve".