101721015668043 has 12 divisors (see below), whose sum is σ = 148445101904008. Its totient is φ = 67114896935040.

The previous prime is 101721015668039. The next prime is 101721015668053. The reversal of 101721015668043 is 340866510127101.

101721015668043 is a `hidden beast` number, since 1 + 0 + 1 + 7 + 2 + 1 + 0 + 1 + 566 + 80 + 4 + 3 = 666.

It is not a de Polignac number, because 101721015668043 - 2² = 101721015668039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101721015668043.

It is not an unprimeable number, because it can be changed into a prime (101721015668053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58259458273 + ... + 58259460018.

Almost surely, 2^{101721015668043} is an apocalyptic number.

101721015668043 is a deficient number, since it is larger than the sum of its proper divisors (46724086235965).

101721015668043 is a wasteful number, since it uses less digits than its factorization.

101721015668043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116518918394 (or 116518918391 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 101721015668043 in words is "one hundred one trillion, seven hundred twenty-one billion, fifteen million, six hundred sixty-eight thousand, forty-three".