100021001022 has 24 divisors (see below), whose sum is σ = 217040049720. Its totient is φ = 33289890480.

The previous prime is 100021001021. The next prime is 100021001023. The reversal of 100021001022 is 220100120001.

It is an interprime number because it is at equal distance from previous prime (100021001021) and next prime (100021001023).

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 = 100021000995 and 100021001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021001021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4191372 + ... + 4215167.

It is an arithmetic number, because the mean of its divisors is an integer number (9043335405).

Almost surely, 2^100021001022 is an apocalyptic number.

100021001022 is an abundant number, since it is smaller than the sum of its proper divisors (117019048698).

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

100021001022 is a wasteful number, since it uses less digits than its factorization.

100021001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8407208 (or 8407205 counting only the distinct ones).

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

Adding to 100021001022 its reverse (220100120001), we get a palindrome (320121121023).

The spelling of 100021001022 in words is "one hundred billion, twenty-one million, one thousand, twenty-two".