212021113021 has 2 divisors, whose sum is σ = 212021113022. Its totient is φ = 212021113020.

The previous prime is 212021112997. The next prime is 212021113079. The reversal of 212021113021 is 120311120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193344884100 + 18676228921 = 439710^2 + 136661^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021113021 - 2¹⁵ = 212021080253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021112986 and 212021113004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021113321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010556510 + 106010556511.

It is an arithmetic number, because the mean of its divisors is an integer number (106010556511).

Almost surely, 2^212021113021 is an apocalyptic number.

It is an amenable number.

212021113021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021113021 is an equidigital number, since it uses as much as digits as its factorization.

212021113021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 212021113021 its reverse (120311120212), we get a palindrome (332332233233).

The spelling of 212021113021 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, twenty-one".