100111001122021 has 4 divisors (see below), whose sum is σ = 100635142489344. Its totient is φ = 99586859754700.

The previous prime is 100111001122009. The next prime is 100111001122061. The reversal of 100111001122021 is 120221100111001.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 100111001122021 - 2¹¹ = 100111001119973 is a prime.

It is a super-2 number, since 2×100111001122021² (a number of 29 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 = 100111001121992 and 100111001122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111001122061) 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, 262070683375 + ... + 262070683756.

It is an arithmetic number, because the mean of its divisors is an integer number (25158785622336).

Almost surely, 2^{100111001122021} is an apocalyptic number.

It is an amenable number.

100111001122021 is a deficient number, since it is larger than the sum of its proper divisors (524141367323).

100111001122021 is an equidigital number, since it uses as much as digits as its factorization.

100111001122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524141367322.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 100111001122021 its reverse (120221100111001), we get a palindrome (220332101233022).

The spelling of 100111001122021 in words is "one hundred trillion, one hundred eleven billion, one million, one hundred twenty-two thousand, twenty-one".