101002401561 has 4 divisors (see below), whose sum is σ = 134669868752. Its totient is φ = 67334934372.

The previous prime is 101002401551. The next prime is 101002401571. The reversal of 101002401561 is 165104200101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165104200101 = 3 ⋅55034733367.

It is an interprime number because it is at equal distance from previous prime (101002401551) and next prime (101002401571).

It is not a de Polignac number, because 101002401561 - 2⁶ = 101002401497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101002401541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16833733591 + ... + 16833733596.

It is an arithmetic number, because the mean of its divisors is an integer number (33667467188).

Almost surely, 2^101002401561 is an apocalyptic number.

It is an amenable number.

101002401561 is a deficient number, since it is larger than the sum of its proper divisors (33667467191).

101002401561 is an equidigital number, since it uses as much as digits as its factorization.

101002401561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33667467190.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 101002401561 its reverse (165104200101), we get a palindrome (266106601662).

The spelling of 101002401561 in words is "one hundred one billion, two million, four hundred one thousand, five hundred sixty-one".