122111020221 has 4 divisors (see below), whose sum is σ = 162814693632. Its totient is φ = 81407346812.

The previous prime is 122111020159. The next prime is 122111020223. The reversal of 122111020221 is 122020111221.

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 not a de Polignac number, because 122111020221 - 2⁷ = 122111020093 is a prime.

It is a super-2 number, since 2×122111020221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122111020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111020223) 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, 20351836701 + ... + 20351836706.

It is an arithmetic number, because the mean of its divisors is an integer number (40703673408).

Almost surely, 2^122111020221 is an apocalyptic number.

It is an amenable number.

122111020221 is a deficient number, since it is larger than the sum of its proper divisors (40703673411).

122111020221 is an equidigital number, since it uses as much as digits as its factorization.

122111020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40703673410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122111020221 its reverse (122020111221), we get a palindrome (244131131442).

The spelling of 122111020221 in words is "one hundred twenty-two billion, one hundred eleven million, twenty thousand, two hundred twenty-one".