100412343221 has 4 divisors (see below), whose sum is σ = 100414317132. Its totient is φ = 100410369312.

The previous prime is 100412343217. The next prime is 100412343253. The reversal of 100412343221 is 122343214001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44356572100 + 56055771121 = 210610^2 + 236761^2 .

It is a cyclic number.

It is not a de Polignac number, because 100412343221 - 2² = 100412343217 is a prime.

It is a super-2 number, since 2×100412343221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100412343271) 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, 908576 + ... + 1013081.

It is an arithmetic number, because the mean of its divisors is an integer number (25103579283).

Almost surely, 2^100412343221 is an apocalyptic number.

It is an amenable number.

100412343221 is a deficient number, since it is larger than the sum of its proper divisors (1973911).

100412343221 is an equidigital number, since it uses as much as digits as its factorization.

100412343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973910.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 100412343221 its reverse (122343214001), we get a palindrome (222755557222).

The spelling of 100412343221 in words is "one hundred billion, four hundred twelve million, three hundred forty-three thousand, two hundred twenty-one".