20212122131212 has 24 divisors (see below), whose sum is σ = 38616438046032. Its totient is φ = 9180266472000.

The previous prime is 20212122131189. The next prime is 20212122131281. The reversal of 20212122131212 is 21213122121202.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176486343 + ... + 176600830.

It is an arithmetic number, because the mean of its divisors is an integer number (1609018251918).

Almost surely, 2^{20212122131212} is an apocalyptic number.

20212122131212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20212122131212 is a deficient number, since it is larger than the sum of its proper divisors (18404315914820).

20212122131212 is a wasteful number, since it uses less digits than its factorization.

20212122131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353088489 (or 353088487 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 20212122131212 its reverse (21213122121202), we get a palindrome (41425244252414).

The spelling of 20212122131212 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-two million, one hundred thirty-one thousand, two hundred twelve".