121110222421 has 4 divisors (see below), whose sum is σ = 123687035712. Its totient is φ = 118533409132.

The previous prime is 121110222367. The next prime is 121110222479. The reversal of 121110222421 is 124222011121.

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 121110222421 - 2⁹ = 121110221909 is a prime.

It is a super-2 number, since 2×121110222421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110222221) 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, 1288406575 + ... + 1288406668.

It is an arithmetic number, because the mean of its divisors is an integer number (30921758928).

Almost surely, 2^121110222421 is an apocalyptic number.

It is an amenable number.

121110222421 is a deficient number, since it is larger than the sum of its proper divisors (2576813291).

121110222421 is an equidigital number, since it uses as much as digits as its factorization.

121110222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576813290.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121110222421 its reverse (124222011121), we get a palindrome (245332233542).

The spelling of 121110222421 in words is "one hundred twenty-one billion, one hundred ten million, two hundred twenty-two thousand, four hundred twenty-one".