121220102202102 has 48 divisors (see below), whose sum is σ = 276468637536000. Its totient is φ = 38279791659312.

The previous prime is 121220102202029. The next prime is 121220102202109. The reversal of 121220102202102 is 201202201022121.

It is a happy number.

121220102202102 is a `hidden beast` number, since 1 + 2 + 1 + 220 + 10 + 220 + 210 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220102202109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57946399 + ... + 60001877.

It is an arithmetic number, because the mean of its divisors is an integer number (5759763282000).

Almost surely, 2^{121220102202102} is an apocalyptic number.

121220102202102 is an abundant number, since it is smaller than the sum of its proper divisors (155248535333898).

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

121220102202102 is a wasteful number, since it uses less digits than its factorization.

121220102202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227945 (or 2227942 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121220102202102 its reverse (201202201022121), we get a palindrome (322422303224223).

The spelling of 121220102202102 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred two million, two hundred two thousand, one hundred two".