100000122021220 has 12 divisors (see below), whose sum is σ = 210000256244604. Its totient is φ = 40000048808480.

The previous prime is 100000122021209. The next prime is 100000122021251. The reversal of 100000122021220 is 22120221000001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63694700962816 + 36305421058404 = 7980896^2 + 6025398^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 100000122021220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500003050511 + ... + 2500003050550.

It is an arithmetic number, because the mean of its divisors is an integer number (17500021353717).

Almost surely, 2^{100000122021220} is an apocalyptic number.

100000122021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100000122021220 is an abundant number, since it is smaller than the sum of its proper divisors (110000134223384).

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

100000122021220 is a wasteful number, since it uses less digits than its factorization.

100000122021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000006101070 (or 5000006101068 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100000122021220 its reverse (22120221000001), we get a palindrome (122120343021221).

The spelling of 100000122021220 in words is "one hundred trillion, one hundred twenty-two million, twenty-one thousand, two hundred twenty".