122100011000021 has 16 divisors (see below), whose sum is σ = 125916928370688. Its totient is φ = 118323171792000.

The previous prime is 122100010999987. The next prime is 122100011000041. The reversal of 122100011000021 is 120000110001221.

It is a cyclic number.

It is not a de Polignac number, because 122100011000021 - 2¹⁰ = 122100010998997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122100010999966 and 122100011000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100011000041) 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, 73701836 + ... + 75340298.

It is an arithmetic number, because the mean of its divisors is an integer number (7869808023168).

Almost surely, 2^{122100011000021} is an apocalyptic number.

It is an amenable number.

122100011000021 is a deficient number, since it is larger than the sum of its proper divisors (3816917370667).

122100011000021 is a wasteful number, since it uses less digits than its factorization.

122100011000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650692.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 122100011000021 its reverse (120000110001221), we get a palindrome (242100121001242).

The spelling of 122100011000021 in words is "one hundred twenty-two trillion, one hundred billion, eleven million, twenty-one", and thus it is an aban number.