1321131000210 has 64 divisors (see below), whose sum is σ = 3781224640512. Its totient is φ = 288843546816.

The previous prime is 1321131000173. The next prime is 1321131000251. The reversal of 1321131000210 is 120001311231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321131000210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136758214 + ... + 136767873.

It is an arithmetic number, because the mean of its divisors is an integer number (59081635008).

Almost surely, 2^{1321131000210} is an apocalyptic number.

1321131000210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321131000210 is an abundant number, since it is smaller than the sum of its proper divisors (2460093640302).

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

1321131000210 is a wasteful number, since it uses less digits than its factorization.

1321131000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273526127.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1321131000210 its reverse (120001311231), we get a palindrome (1441132311441).

The spelling of 1321131000210 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-one million, two hundred ten", and thus it is an aban number.