115554102421 has 4 divisors (see below), whose sum is σ = 119281654144. Its totient is φ = 111826550700.

The previous prime is 115554102373. The next prime is 115554102427. The reversal of 115554102421 is 124201455511.

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.

It is a cyclic number.

It is not a de Polignac number, because 115554102421 - 2⁹ = 115554101909 is a prime.

It is a super-2 number, since 2×115554102421² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 3727551691 = 115554102421 / (1 + 1 + 5 + 5 + 5 + 4 + 1 + 0 + 2 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115554102427) 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, 1863775815 + ... + 1863775876.

It is an arithmetic number, because the mean of its divisors is an integer number (29820413536).

Almost surely, 2^115554102421 is an apocalyptic number.

It is an amenable number.

115554102421 is a deficient number, since it is larger than the sum of its proper divisors (3727551723).

115554102421 is an equidigital number, since it uses as much as digits as its factorization.

115554102421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727551722.

The product of its (nonzero) digits is 8000, while the sum is 31.

Adding to 115554102421 its reverse (124201455511), we get a palindrome (239755557932).

The spelling of 115554102421 in words is "one hundred fifteen billion, five hundred fifty-four million, one hundred two thousand, four hundred twenty-one".