115621012001 has 4 divisors (see below), whose sum is σ = 126132013104. Its totient is φ = 105110010900.

The previous prime is 115621011941. The next prime is 115621012007. The reversal of 115621012001 is 100210126511.

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 115621012001 - 2¹⁸ = 115620749857 is a prime.

It is a super-2 number, since 2×115621012001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115621012007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5255500535 + ... + 5255500556.

It is an arithmetic number, because the mean of its divisors is an integer number (31533003276).

Almost surely, 2^115621012001 is an apocalyptic number.

115621012001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115621012001 is a deficient number, since it is larger than the sum of its proper divisors (10511001103).

115621012001 is a wasteful number, since it uses less digits than its factorization.

115621012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511001102.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 115621012001 its reverse (100210126511), we get a palindrome (215831138512).

The spelling of 115621012001 in words is "one hundred fifteen billion, six hundred twenty-one million, twelve thousand, one".