213103131012 has 120 divisors (see below), whose sum is σ = 578453059800. Its totient is φ = 68329142784.

The previous prime is 213103130987. The next prime is 213103131023. The reversal of 213103131012 is 210131301312.

213103131012 is a `hidden beast` number, since 2 + 1 + 310 + 31 + 310 + 12 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33366136896 + 179736994116 = 182664^2 + 423954^2 .

It is a super-2 number, since 2×213103131012² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2485368 + ... + 2569680.

It is an arithmetic number, because the mean of its divisors is an integer number (4820442165).

Almost surely, 2^213103131012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213103131012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289226529900).

213103131012 is an abundant number, since it is smaller than the sum of its proper divisors (365349928788).

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

213103131012 is a wasteful number, since it uses less digits than its factorization.

213103131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84627 (or 84616 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 213103131012 its reverse (210131301312), we get a palindrome (423234432324).

The spelling of 213103131012 in words is "two hundred thirteen billion, one hundred three million, one hundred thirty-one thousand, twelve".