121212111100122 has 96 divisors (see below), whose sum is σ = 315425033818752. Its totient is φ = 32912402205312.

The previous prime is 121212111100097. The next prime is 121212111100127. The reversal of 121212111100122 is 221001111212121.

It is a happy number.

121212111100122 is a `hidden beast` number, since 121 + 212 + 111 + 100 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121212111100095 and 121212111100104.

It is not an unprimeable number, because it can be changed into a prime (121212111100127) 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, 302125393 + ... + 302526324.

It is an arithmetic number, because the mean of its divisors is an integer number (3285677435612).

Almost surely, 2^{121212111100122} is an apocalyptic number.

121212111100122 is an abundant number, since it is smaller than the sum of its proper divisors (194212922718630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121212111100122 is a wasteful number, since it uses less digits than its factorization.

121212111100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604651812 (or 604651809 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121212111100122 its reverse (221001111212121), we get a palindrome (342213222312243).

The spelling of 121212111100122 in words is "one hundred twenty-one trillion, two hundred twelve billion, one hundred eleven million, one hundred thousand, one hundred twenty-two".