100031221233021 has 16 divisors (see below), whose sum is σ = 145248445702080. Its totient is φ = 60866015337600.

The previous prime is 100031221233017. The next prime is 100031221233023. The reversal of 100031221233021 is 120332122130001.

It is not a de Polignac number, because 100031221233021 - 2² = 100031221233017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100031221233023) 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, 14409564555 + ... + 14409571496.

It is an arithmetic number, because the mean of its divisors is an integer number (9078027856380).

Almost surely, 2^{100031221233021} is an apocalyptic number.

It is an amenable number.

100031221233021 is a deficient number, since it is larger than the sum of its proper divisors (45217224469059).

100031221233021 is a wasteful number, since it uses less digits than its factorization.

100031221233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28819136156.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 100031221233021 its reverse (120332122130001), we get a palindrome (220363343363022).

The spelling of 100031221233021 in words is "one hundred trillion, thirty-one billion, two hundred twenty-one million, two hundred thirty-three thousand, twenty-one".