101981985799020 has 96 divisors (see below), whose sum is σ = 293279257387200. Its totient is φ = 26459095440384.

The previous prime is 101981985798961. The next prime is 101981985799027. The reversal of 101981985799020 is 20997589189101.

It is not an unprimeable number, because it can be changed into a prime (101981985799027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53382486 + ... + 55259874.

It is an arithmetic number, because the mean of its divisors is an integer number (3054992264450).

Almost surely, 2^{101981985799020} is an apocalyptic number.

101981985799020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101981985799020 is an abundant number, since it is smaller than the sum of its proper divisors (191297271588180).

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

101981985799020 is a wasteful number, since it uses less digits than its factorization.

101981985799020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901907 (or 1901905 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 69.

The spelling of 101981985799020 in words is "one hundred one trillion, nine hundred eighty-one billion, nine hundred eighty-five million, seven hundred ninety-nine thousand, twenty".