212011213021 has 16 divisors (see below), whose sum is σ = 226754264448. Its totient is φ = 197788536000.

The previous prime is 212011213019. The next prime is 212011213079. The reversal of 212011213021 is 120312110212.

It is a cyclic number.

It is not a de Polignac number, because 212011213021 - 2¹ = 212011213019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011212986 and 212011213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011213091) 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, 525450 + ... + 836731.

It is an arithmetic number, because the mean of its divisors is an integer number (14172141528).

Almost surely, 2^212011213021 is an apocalyptic number.

It is an amenable number.

212011213021 is a deficient number, since it is larger than the sum of its proper divisors (14743051427).

212011213021 is a wasteful number, since it uses less digits than its factorization.

212011213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362372.

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

Adding to 212011213021 its reverse (120312110212), we get a palindrome (332323323233).

The spelling of 212011213021 in words is "two hundred twelve billion, eleven million, two hundred thirteen thousand, twenty-one".