100122220020021 has 16 divisors (see below), whose sum is σ = 133538470962624. Its totient is φ = 66727060523264.

The previous prime is 100122220020013. The next prime is 100122220020037. The reversal of 100122220020021 is 120020022221001.

It is a cyclic number.

It is not a de Polignac number, because 100122220020021 - 2³ = 100122220020013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100122220070021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154937830 + ... + 155582696.

It is an arithmetic number, because the mean of its divisors is an integer number (8346154435164).

Almost surely, 2^{100122220020021} is an apocalyptic number.

It is an amenable number.

100122220020021 is a deficient number, since it is larger than the sum of its proper divisors (33416250942603).

100122220020021 is a wasteful number, since it uses less digits than its factorization.

100122220020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661140.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 100122220020021 its reverse (120020022221001), we get a palindrome (220142242241022).

The spelling of 100122220020021 in words is "one hundred trillion, one hundred twenty-two billion, two hundred twenty million, twenty thousand, twenty-one".