213001212021 has 16 divisors (see below), whose sum is σ = 306434963520. Its totient is φ = 130826067840.

The previous prime is 213001212001. The next prime is 213001212043. The reversal of 213001212021 is 120212100312.

It is not a de Polignac number, because 213001212021 - 2²¹ = 212999114869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213001212001) 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, 5221111 + ... + 5261748.

It is an arithmetic number, because the mean of its divisors is an integer number (19152185220).

Almost surely, 2^213001212021 is an apocalyptic number.

It is an amenable number.

213001212021 is a deficient number, since it is larger than the sum of its proper divisors (93433751499).

213001212021 is a wasteful number, since it uses less digits than its factorization.

213001212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10483396.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 213001212021 its reverse (120212100312), we get a palindrome (333213312333).

It can be divided in two parts, 21300 and 1212021, that added together give a palindrome (1233321).

The spelling of 213001212021 in words is "two hundred thirteen billion, one million, two hundred twelve thousand, twenty-one".