100020020022 has 80 divisors (see below), whose sum is σ = 242787874560. Its totient is φ = 30775281264.

The previous prime is 100020019903. The next prime is 100020020027. The reversal of 100020020022 is 220020020001.

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 = 100020019986 and 100020020013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100020020027) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 215403 + ... + 496425.

It is an arithmetic number, because the mean of its divisors is an integer number (3034848432).

Almost surely, 2^100020020022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100020020022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121393937280).

100020020022 is an abundant number, since it is smaller than the sum of its proper divisors (142767854538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100020020022 is an equidigital number, since it uses as much as digits as its factorization.

100020020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281076 (or 281041 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 100020020022 its reverse (220020020001), we get a palindrome (320040040023).

The spelling of 100020020022 in words is "one hundred billion, twenty million, twenty thousand, twenty-two".