212021221013 has 16 divisors (see below), whose sum is σ = 248240584704. Its totient is φ = 177285248640.

The previous prime is 212021220979. The next prime is 212021221031. The reversal of 212021221013 is 310122120212.

It is a cyclic number.

It is not a de Polignac number, because 212021221013 - 2¹⁸ = 212020958869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021220982 and 212021221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021221063) 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, 4697831 + ... + 4742747.

It is an arithmetic number, because the mean of its divisors is an integer number (15515036544).

Almost surely, 2^212021221013 is an apocalyptic number.

It is an amenable number.

212021221013 is a deficient number, since it is larger than the sum of its proper divisors (36219363691).

212021221013 is a wasteful number, since it uses less digits than its factorization.

212021221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61412.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212021221013 its reverse (310122120212), we get a palindrome (522143341225).

The spelling of 212021221013 in words is "two hundred twelve billion, twenty-one million, two hundred twenty-one thousand, thirteen".