121110122221 has 48 divisors (see below), whose sum is σ = 142280208000. Its totient is φ = 102714480000.

The previous prime is 121110122213. The next prime is 121110122249. The reversal of 121110122221 is 122221011121.

It is not a de Polignac number, because 121110122221 - 2³ = 121110122213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121110122195 and 121110122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110122621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46206291 + ... + 46208911.

It is an arithmetic number, because the mean of its divisors is an integer number (2964171000).

Almost surely, 2^121110122221 is an apocalyptic number.

121110122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121110122221 is a deficient number, since it is larger than the sum of its proper divisors (21170085779).

121110122221 is a wasteful number, since it uses less digits than its factorization.

121110122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962 (or 2951 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121110122221 its reverse (122221011121), we get a palindrome (243331133342).

Subtracting 121110122221 from its reverse (122221011121), we obtain a square (1110888900 = 33330²).

The spelling of 121110122221 in words is "one hundred twenty-one billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".