321213252542 has 16 divisors (see below), whose sum is σ = 593009081952. Its totient is φ = 127073374560.

The previous prime is 321213252473. The next prime is 321213252557. The reversal of 321213252542 is 245252312123.

It is a super-2 number, since 2×321213252542² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321213252499 and 321213252508.

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, 882453809 + ... + 882454172.

It is an arithmetic number, because the mean of its divisors is an integer number (37063067622).

Almost surely, 2^321213252542 is an apocalyptic number.

321213252542 is a deficient number, since it is larger than the sum of its proper divisors (271795829410).

321213252542 is a wasteful number, since it uses less digits than its factorization.

321213252542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764908003.

The product of its digits is 28800, while the sum is 32.

Adding to 321213252542 its reverse (245252312123), we get a palindrome (566465564665).

The spelling of 321213252542 in words is "three hundred twenty-one billion, two hundred thirteen million, two hundred fifty-two thousand, five hundred forty-two".