122100000221 has 4 divisors (see below), whose sum is σ = 123922388352. Its totient is φ = 120277612092.

The previous prime is 122100000163. The next prime is 122100000229. The reversal of 122100000221 is 122000001221.

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: 122000001221 = 7 ⋅17428571603.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122100000221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122100000229) 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, 911193965 + ... + 911194098.

It is an arithmetic number, because the mean of its divisors is an integer number (30980597088).

Almost surely, 2^122100000221 is an apocalyptic number.

It is an amenable number.

122100000221 is a deficient number, since it is larger than the sum of its proper divisors (1822388131).

122100000221 is an equidigital number, since it uses as much as digits as its factorization.

122100000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822388130.

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

Adding to 122100000221 its reverse (122000001221), we get a palindrome (244100001442).

The spelling of 122100000221 in words is "one hundred twenty-two billion, one hundred million, two hundred twenty-one", and thus it is an aban number.