101781247120 has 80 divisors (see below), whose sum is σ = 273125161728. Its totient is φ = 34550899200.

The previous prime is 101781247093. The next prime is 101781247123. The reversal of 101781247120 is 21742187101.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (101781247123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843204 + ... + 956323.

Almost surely, 2^101781247120 is an apocalyptic number.

101781247120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101781247120 is an abundant number, since it is smaller than the sum of its proper divisors (171343914608).

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

101781247120 is a wasteful number, since it uses less digits than its factorization.

101781247120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799648 (or 1799642 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 34.

The spelling of 101781247120 in words is "one hundred one billion, seven hundred eighty-one million, two hundred forty-seven thousand, one hundred twenty".