10121531780 has 48 divisors (see below), whose sum is σ = 22212368640. Its totient is φ = 3870306048.

The previous prime is 10121531779. The next prime is 10121531807. The reversal of 10121531780 is 8713512101.

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, 84785 + ... + 165624.

It is an arithmetic number, because the mean of its divisors is an integer number (462757680).

Almost surely, 2^10121531780 is an apocalyptic number.

10121531780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10121531780 is an abundant number, since it is smaller than the sum of its proper divisors (12090836860).

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

10121531780 is a wasteful number, since it uses less digits than its factorization.

10121531780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250508 (or 250506 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 29.

The spelling of 10121531780 in words is "ten billion, one hundred twenty-one million, five hundred thirty-one thousand, seven hundred eighty".