213133211220 has 96 divisors (see below), whose sum is σ = 616961915136. Its totient is φ = 54933120000.

The previous prime is 213133211197. The next prime is 213133211237. The reversal of 213133211220 is 22112331312.

It is a congruent number.

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, 17320 + ... + 653120.

It is an arithmetic number, because the mean of its divisors is an integer number (6426686616).

Almost surely, 2^213133211220 is an apocalyptic number.

213133211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213133211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308480957568).

213133211220 is an abundant number, since it is smaller than the sum of its proper divisors (403828703916).

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

213133211220 is a wasteful number, since it uses less digits than its factorization.

213133211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636001 (or 635999 counting only the distinct ones).

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

Adding to 213133211220 its reverse (22112331312), we get a palindrome (235245542532).

The spelling of 213133211220 in words is "two hundred thirteen billion, one hundred thirty-three million, two hundred eleven thousand, two hundred twenty".