321220132040 has 64 divisors (see below), whose sum is σ = 726159772800. Its totient is φ = 127882478592.

The previous prime is 321220132027. The next prime is 321220132049. The reversal of 321220132040 is 40231022123.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (321220132049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7234949 + ... + 7279211.

It is an arithmetic number, because the mean of its divisors is an integer number (11346246450).

Almost surely, 2^321220132040 is an apocalyptic number.

It is an amenable number.

321220132040 is an abundant number, since it is smaller than the sum of its proper divisors (404939640760).

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

321220132040 is a wasteful number, since it uses less digits than its factorization.

321220132040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45126 (or 45122 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 321220132040 its reverse (40231022123), we get a palindrome (361451154163).

The spelling of 321220132040 in words is "three hundred twenty-one billion, two hundred twenty million, one hundred thirty-two thousand, forty".