121122200121 has 12 divisors (see below), whose sum is σ = 174874656528. Its totient is φ = 74536738224.

The previous prime is 121122200051. The next prime is 121122200167. The reversal of 121122200121 is 121002221121.

It is not a de Polignac number, because 121122200121 - 2¹³ = 121122191929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121122200121.

It is not an unprimeable number, because it can be changed into a prime (121122200821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119449395 + ... + 119450408.

It is an arithmetic number, because the mean of its divisors is an integer number (14572888044).

Almost surely, 2^121122200121 is an apocalyptic number.

It is an amenable number.

121122200121 is a deficient number, since it is larger than the sum of its proper divisors (53752456407).

121122200121 is a wasteful number, since it uses less digits than its factorization.

121122200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238899832 (or 238899819 counting only the distinct ones).

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

Adding to 121122200121 its reverse (121002221121), we get a palindrome (242124421242).

The spelling of 121122200121 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred thousand, one hundred twenty-one".