212202020121 has 32 divisors (see below), whose sum is σ = 357640566528. Its totient is φ = 108905575680.

The previous prime is 212202020113. The next prime is 212202020161. The reversal of 212202020121 is 121020202212.

212202020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212202020121 - 2³ = 212202020113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212202020121.

It is not an unprimeable number, because it can be changed into a prime (212202020161) 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 in 31 ways as a sum of consecutive naturals, for example, 10493910 + ... + 10514111.

It is an arithmetic number, because the mean of its divisors is an integer number (11176267704).

Almost surely, 2^212202020121 is an apocalyptic number.

212202020121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212202020121 is a deficient number, since it is larger than the sum of its proper divisors (145438546407).

212202020121 is a wasteful number, since it uses less digits than its factorization.

212202020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21008081.

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

Adding to 212202020121 its reverse (121020202212), we get a palindrome (333222222333).

The spelling of 212202020121 in words is "two hundred twelve billion, two hundred two million, twenty thousand, one hundred twenty-one".