1251101112540 has 48 divisors (see below), whose sum is σ = 3545288949888. Its totient is φ = 329607360064.

The previous prime is 1251101112509. The next prime is 1251101112551. The reversal of 1251101112540 is 452111011521.

It is a self number, because there is not a number n which added to its sum of digits gives 1251101112540.

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, 125607582 + ... + 125617541.

It is an arithmetic number, because the mean of its divisors is an integer number (73860186456).

Almost surely, 2^{1251101112540} is an apocalyptic number.

1251101112540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251101112540 is an abundant number, since it is smaller than the sum of its proper divisors (2294187837348).

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

1251101112540 is a wasteful number, since it uses less digits than its factorization.

1251101112540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251225218 (or 251225216 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 24.

The spelling of 1251101112540 in words is "one trillion, two hundred fifty-one billion, one hundred one million, one hundred twelve thousand, five hundred forty".