100111122021 has 4 divisors (see below), whose sum is σ = 133481496032. Its totient is φ = 66740748012.

The previous prime is 100111121987. The next prime is 100111122043. The reversal of 100111122021 is 120221111001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120221111001 = 3 ⋅40073703667.

It is not a de Polignac number, because 100111122021 - 2¹¹ = 100111119973 is a prime.

It is a super-2 number, since 2×100111122021² (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 = 100111121988 and 100111122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111122091) 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, 16685187001 + ... + 16685187006.

It is an arithmetic number, because the mean of its divisors is an integer number (33370374008).

Almost surely, 2^100111122021 is an apocalyptic number.

It is an amenable number.

100111122021 is a deficient number, since it is larger than the sum of its proper divisors (33370374011).

100111122021 is an equidigital number, since it uses as much as digits as its factorization.

100111122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33370374010.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100111122021 its reverse (120221111001), we get a palindrome (220332233022).

The spelling of 100111122021 in words is "one hundred billion, one hundred eleven million, one hundred twenty-two thousand, twenty-one".