101821585868 has 12 divisors (see below), whose sum is σ = 178491336072. Its totient is φ = 50824061280.

The previous prime is 101821585829. The next prime is 101821585889. The reversal of 101821585868 is 868585128101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21680273 + ... + 21684968.

It is an arithmetic number, because the mean of its divisors is an integer number (14874278006).

Almost surely, 2^101821585868 is an apocalyptic number.

It is an amenable number.

101821585868 is a deficient number, since it is larger than the sum of its proper divisors (76669750204).

101821585868 is a wasteful number, since it uses less digits than its factorization.

101821585868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43365832 (or 43365830 counting only the distinct ones).

The product of its (nonzero) digits is 1228800, while the sum is 53.

The spelling of 101821585868 in words is "one hundred one billion, eight hundred twenty-one million, five hundred eighty-five thousand, eight hundred sixty-eight".