122102000021 has 4 divisors (see below), whose sum is σ = 122120588544. Its totient is φ = 122083411500.

The previous prime is 122101999951. The next prime is 122102000029. The reversal of 122102000021 is 120000201221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120000201221 = 257 ⋅466926853.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122102000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122101999966 and 122102000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122102000029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9284405 + ... + 9297546.

It is an arithmetic number, because the mean of its divisors is an integer number (30530147136).

Almost surely, 2^122102000021 is an apocalyptic number.

It is an amenable number.

122102000021 is a deficient number, since it is larger than the sum of its proper divisors (18588523).

122102000021 is an equidigital number, since it uses as much as digits as its factorization.

122102000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18588522.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 122102000021 its reverse (120000201221), we get a palindrome (242102201242).

The spelling of 122102000021 in words is "one hundred twenty-two billion, one hundred two million, twenty-one", and thus it is an aban number.