1321012023210 has 192 divisors, whose sum is σ = 4090152568320. Its totient is φ = 303390204480.

The previous prime is 1321012023209. The next prime is 1321012023259. The reversal of 1321012023210 is 123202101231.

1321012023210 is a `hidden beast` number, since 1 + 321 + 0 + 1 + 20 + 2 + 321 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 792672 + ... + 1808411.

It is an arithmetic number, because the mean of its divisors is an integer number (21302877960).

Almost surely, 2^{1321012023210} is an apocalyptic number.

1321012023210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321012023210 is an abundant number, since it is smaller than the sum of its proper divisors (2769140545110).

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

1321012023210 is a wasteful number, since it uses less digits than its factorization.

1321012023210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601135 (or 2601123 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1321012023210 its reverse (123202101231), we get a palindrome (1444214124441).

The spelling of 1321012023210 in words is "one trillion, three hundred twenty-one billion, twelve million, twenty-three thousand, two hundred ten".