212013110021 has 16 divisors (see below), whose sum is σ = 225333972288. Its totient is φ = 198787564800.

The previous prime is 212013109999. The next prime is 212013110033. The reversal of 212013110021 is 120011310212.

It is a cyclic number.

It is not a de Polignac number, because 212013110021 - 2²² = 212008915717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212013109978 and 212013110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212013110921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7757246 + ... + 7784528.

It is an arithmetic number, because the mean of its divisors is an integer number (14083373268).

Almost surely, 2^212013110021 is an apocalyptic number.

It is an amenable number.

212013110021 is a deficient number, since it is larger than the sum of its proper divisors (13320862267).

212013110021 is a wasteful number, since it uses less digits than its factorization.

212013110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29012.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 212013110021 its reverse (120011310212), we get a palindrome (332024420233).

The spelling of 212013110021 in words is "two hundred twelve billion, thirteen million, one hundred ten thousand, twenty-one".