213011012220 has 48 divisors (see below), whose sum is σ = 596882555808. Its totient is φ = 56759915520.

The previous prime is 213011012209. The next prime is 213011012237. The reversal of 213011012220 is 22210110312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 213011012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1264489 + ... + 1423008.

It is an arithmetic number, because the mean of its divisors is an integer number (12435053246).

Almost surely, 2^213011012220 is an apocalyptic number.

213011012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213011012220 is an abundant number, since it is smaller than the sum of its proper divisors (383871543588).

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

213011012220 is a wasteful number, since it uses less digits than its factorization.

213011012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688830 (or 2688828 counting only the distinct ones).

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

Adding to 213011012220 its reverse (22210110312), we get a palindrome (235221122532).

The spelling of 213011012220 in words is "two hundred thirteen billion, eleven million, twelve thousand, two hundred twenty".