1321020125110 has 24 divisors (see below), whose sum is σ = 2766054385440. Its totient is φ = 452921185584.

The previous prime is 1321020125083. The next prime is 1321020125207. The reversal of 1321020125110 is 115210201231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1347979230 + ... + 1347980209.

It is an arithmetic number, because the mean of its divisors is an integer number (115252266060).

Almost surely, 2^{1321020125110} is an apocalyptic number.

1321020125110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321020125110 is an abundant number, since it is smaller than the sum of its proper divisors (1445034260330).

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

1321020125110 is a wasteful number, since it uses less digits than its factorization.

1321020125110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695959460 (or 2695959453 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 1321020125110 its reverse (115210201231), we get a palindrome (1436230326341).

The spelling of 1321020125110 in words is "one trillion, three hundred twenty-one billion, twenty million, one hundred twenty-five thousand, one hundred ten".