213021133122 has 64 divisors (see below), whose sum is σ = 494025202944. Its totient is φ = 59974732800.

The previous prime is 213021133109. The next prime is 213021133133. The reversal of 213021133122 is 221331120312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3393622 + ... + 3455822.

It is an arithmetic number, because the mean of its divisors is an integer number (7719143796).

Almost surely, 2^213021133122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213021133122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247012601472).

213021133122 is an abundant number, since it is smaller than the sum of its proper divisors (281004069822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213021133122 is a wasteful number, since it uses less digits than its factorization.

213021133122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63403.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213021133122 its reverse (221331120312), we get a palindrome (434352253434).

The spelling of 213021133122 in words is "two hundred thirteen billion, twenty-one million, one hundred thirty-three thousand, one hundred twenty-two".