213122321012 has 24 divisors (see below), whose sum is σ = 376047379680. Its totient is φ = 105681846240.

The previous prime is 213122321003. The next prime is 213122321039. The reversal of 213122321012 is 210123221312.

It is a super-2 number, since 2×213122321012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319523 + ... + 726869.

It is an arithmetic number, because the mean of its divisors is an integer number (15668640820).

Almost surely, 2^213122321012 is an apocalyptic number.

It is an amenable number.

213122321012 is a deficient number, since it is larger than the sum of its proper divisors (162925058668).

213122321012 is a wasteful number, since it uses less digits than its factorization.

213122321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408431 (or 408429 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 213122321012 its reverse (210123221312), we get a palindrome (423245542324).

The spelling of 213122321012 in words is "two hundred thirteen billion, one hundred twenty-two million, three hundred twenty-one thousand, twelve".