1220322131000 has 64 divisors (see below), whose sum is σ = 3263490060480. Its totient is φ = 418396156800.

The previous prime is 1220322130931. The next prime is 1220322131051. The reversal of 1220322131000 is 1312230221.

It is a super-2 number, since 2×1220322131000² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220322131000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87158867 + ... + 87172866.

It is an arithmetic number, because the mean of its divisors is an integer number (50992032195).

Almost surely, 2^{1220322131000} is an apocalyptic number.

1220322131000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220322131000 is an abundant number, since it is smaller than the sum of its proper divisors (2043167929480).

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

1220322131000 is a wasteful number, since it uses less digits than its factorization.

1220322131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174331761 (or 174331747 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1220322131000 its reverse (1312230221), we get a palindrome (1221634361221).

The spelling of 1220322131000 in words is "one trillion, two hundred twenty billion, three hundred twenty-two million, one hundred thirty-one thousand".