101555400521 has 16 divisors (see below), whose sum is σ = 104288256000. Its totient is φ = 98868461328.

The previous prime is 101555400493. The next prime is 101555400523. The reversal of 101555400521 is 125004555101.

It is a cyclic number.

It is not a de Polignac number, because 101555400521 - 2²² = 101551206217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101555400523) 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, 1604330 + ... + 1666428.

It is an arithmetic number, because the mean of its divisors is an integer number (6518016000).

Almost surely, 2^101555400521 is an apocalyptic number.

It is an amenable number.

101555400521 is a deficient number, since it is larger than the sum of its proper divisors (2732855479).

101555400521 is a wasteful number, since it uses less digits than its factorization.

101555400521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62468.

The product of its (nonzero) digits is 5000, while the sum is 29.

Adding to 101555400521 its reverse (125004555101), we get a palindrome (226559955622).

The spelling of 101555400521 in words is "one hundred one billion, five hundred fifty-five million, four hundred thousand, five hundred twenty-one".