20212122012142 has 16 divisors (see below), whose sum is σ = 31342583487600. Its totient is φ = 9769116922560.

The previous prime is 20212122012107. The next prime is 20212122012143. The reversal of 20212122012142 is 24121022121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212122012143) 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, 1130675892 + ... + 1130693767.

It is an arithmetic number, because the mean of its divisors is an integer number (1958911467975).

Almost surely, 2^{20212122012142} is an apocalyptic number.

20212122012142 is a deficient number, since it is larger than the sum of its proper divisors (11130461475458).

20212122012142 is a wasteful number, since it uses less digits than its factorization.

20212122012142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261369811.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 20212122012142 its reverse (24121022121202), we get a palindrome (44333144133344).

The spelling of 20212122012142 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-two million, twelve thousand, one hundred forty-two".