122012100221 has 4 divisors (see below), whose sum is σ = 133104109344. Its totient is φ = 110920091100.

The previous prime is 122012100193. The next prime is 122012100269. The reversal of 122012100221 is 122001210221.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122012100221 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 = 122012100196 and 122012100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122012100421) 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, 5546004545 + ... + 5546004566.

It is an arithmetic number, because the mean of its divisors is an integer number (33276027336).

Almost surely, 2^122012100221 is an apocalyptic number.

122012100221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122012100221 is a deficient number, since it is larger than the sum of its proper divisors (11092009123).

122012100221 is a wasteful number, since it uses less digits than its factorization.

122012100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11092009122.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 122012100221 its reverse (122001210221), we get a palindrome (244013310442).

Subtracting from 122012100221 its reverse (122001210221), we obtain a square (10890000 = 3300²).

The spelling of 122012100221 in words is "one hundred twenty-two billion, twelve million, one hundred thousand, two hundred twenty-one".