20212122012 has 24 divisors (see below), whose sum is σ = 47168125200. Its totient is φ = 6736444416.

The previous prime is 20212121989. The next prime is 20212122013. The reversal of 20212122012 is 21022121202.

It is a junction number, because it is equal to n+sod(n) for n = 20212121982 and 20212122000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212122013) 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, 22587 + ... + 202322.

It is an arithmetic number, because the mean of its divisors is an integer number (1965338550).

Almost surely, 2^20212122012 is an apocalyptic number.

It is an amenable number.

20212122012 is an abundant number, since it is smaller than the sum of its proper divisors (26956003188).

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

20212122012 is a wasteful number, since it uses less digits than its factorization.

20212122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232405 (or 232403 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20212122012 its reverse (21022121202), we get a palindrome (41234243214).

The spelling of 20212122012 in words is "twenty billion, two hundred twelve million, one hundred twenty-two thousand, twelve".