101991292080 has 160 divisors (see below), whose sum is σ = 328945041408. Its totient is φ = 26112844800.

The previous prime is 101991292061. The next prime is 101991292087. The reversal of 101991292080 is 80292199101.

It is not an unprimeable number, because it can be changed into a prime (101991292087) 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, 890910 + ... + 998850.

Almost surely, 2^101991292080 is an apocalyptic number.

101991292080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101991292080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164472520704).

101991292080 is an abundant number, since it is smaller than the sum of its proper divisors (226953749328).

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

101991292080 is a wasteful number, since it uses less digits than its factorization.

101991292080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108115 (or 108109 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 101991292080 in words is "one hundred one billion, nine hundred ninety-one million, two hundred ninety-two thousand, eighty".