100311221997 has 12 divisors (see below), whose sum is σ = 165593128480. Its totient is φ = 57320698248.

The previous prime is 100311221987. The next prime is 100311222013. The reversal of 100311221997 is 799122113001.

It is not a de Polignac number, because 100311221997 - 2¹⁴ = 100311205613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100311221917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 796120747 + ... + 796120872.

Almost surely, 2^100311221997 is an apocalyptic number.

It is an amenable number.

100311221997 is a deficient number, since it is larger than the sum of its proper divisors (65281906483).

100311221997 is a wasteful number, since it uses less digits than its factorization.

100311221997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592241632 (or 1592241629 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

Adding to 100311221997 its reverse (799122113001), we get a palindrome (899433334998).

The spelling of 100311221997 in words is "one hundred billion, three hundred eleven million, two hundred twenty-one thousand, nine hundred ninety-seven".