100020111221 has 8 divisors (see below), whose sum is σ = 100305907200. Its totient is φ = 99734388048.

The previous prime is 100020111211. The next prime is 100020111229. The reversal of 100020111221 is 122111020001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100020111221 is a prime.

It is a super-2 number, since 2×100020111221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100020111229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3950615 + ... + 3975851.

It is an arithmetic number, because the mean of its divisors is an integer number (12538238400).

Almost surely, 2^100020111221 is an apocalyptic number.

It is an amenable number.

100020111221 is a deficient number, since it is larger than the sum of its proper divisors (285795979).

100020111221 is a wasteful number, since it uses less digits than its factorization.

100020111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36403.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100020111221 its reverse (122111020001), we get a palindrome (222131131222).

The spelling of 100020111221 in words is "one hundred billion, twenty million, one hundred eleven thousand, two hundred twenty-one".