321131421020 has 48 divisors (see below), whose sum is σ = 681498171648. Its totient is φ = 127097625600.

The previous prime is 321131421011. The next prime is 321131421029. The reversal of 321131421020 is 20124131123.

It is an interprime number because it is at equal distance from previous prime (321131421011) and next prime (321131421029).

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

It is a junction number, because it is equal to n+sod(n) for n = 321131420983 and 321131421001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321131421029) 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, 3085877 + ... + 3188243.

It is an arithmetic number, because the mean of its divisors is an integer number (14197878576).

Almost surely, 2^321131421020 is an apocalyptic number.

It is an amenable number.

321131421020 is an abundant number, since it is smaller than the sum of its proper divisors (360366750628).

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

321131421020 is a wasteful number, since it uses less digits than its factorization.

321131421020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104030 (or 104028 counting only the distinct ones).

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

Adding to 321131421020 its reverse (20124131123), we get a palindrome (341255552143).

The spelling of 321131421020 in words is "three hundred twenty-one billion, one hundred thirty-one million, four hundred twenty-one thousand, twenty".