1312221221010 has 96 divisors (see below), whose sum is σ = 4104391224960. Its totient is φ = 284150156544.

The previous prime is 1312221220997. The next prime is 1312221221027. The reversal of 1312221221010 is 101221222131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54800947 + ... + 54824886.

It is an arithmetic number, because the mean of its divisors is an integer number (42754075260).

Almost surely, 2^{1312221221010} is an apocalyptic number.

1312221221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312221221010 is an abundant number, since it is smaller than the sum of its proper divisors (2792170003950).

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

1312221221010 is a wasteful number, since it uses less digits than its factorization.

1312221221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109625872 (or 109625869 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1312221221010 its reverse (101221222131), we get a palindrome (1413442443141).

The spelling of 1312221221010 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, ten".