100100022021 has 24 divisors (see below), whose sum is σ = 150104433024. Its totient is φ = 66661976160.

The previous prime is 100100022019. The next prime is 100100022049. The reversal of 100100022021 is 120220001001.

It is not a de Polignac number, because 100100022021 - 2¹ = 100100022019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100100021994 and 100100022012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100100022821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7876 + ... + 447506.

It is an arithmetic number, because the mean of its divisors is an integer number (6254351376).

Almost surely, 2^100100022021 is an apocalyptic number.

It is an amenable number.

100100022021 is a deficient number, since it is larger than the sum of its proper divisors (50004411003).

100100022021 is an frugal number, since it uses more digits than its factorization.

100100022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440583 (or 440571 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100100022021 its reverse (120220001001), we get a palindrome (220320023022).

The spelling of 100100022021 in words is "one hundred billion, one hundred million, twenty-two thousand, twenty-one".