104121221531 has 4 divisors (see below), whose sum is σ = 105828126864. Its totient is φ = 102414316200.

The previous prime is 104121221527. The next prime is 104121221537. The reversal of 104121221531 is 135122121401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 104121221531 - 2² = 104121221527 is a prime.

It is a super-2 number, since 2×104121221531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 104121221497 and 104121221506.

It is not an unprimeable number, because it can be changed into a prime (104121221537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853452575 + ... + 853452696.

It is an arithmetic number, because the mean of its divisors is an integer number (26457031716).

Almost surely, 2^104121221531 is an apocalyptic number.

104121221531 is a deficient number, since it is larger than the sum of its proper divisors (1706905333).

104121221531 is an equidigital number, since it uses as much as digits as its factorization.

104121221531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706905332.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 104121221531 its reverse (135122121401), we get a palindrome (239243342932).

The spelling of 104121221531 in words is "one hundred four billion, one hundred twenty-one million, two hundred twenty-one thousand, five hundred thirty-one".