121121220012102 has 48 divisors (see below), whose sum is σ = 262931364774000. Its totient is φ = 40296561918912.

The previous prime is 121121220012097. The next prime is 121121220012127. The reversal of 121121220012102 is 201210022121121.

121121220012102 is a `hidden beast` number, since 1 + 211 + 21 + 220 + 0 + 1 + 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21252424 + ... + 26342132.

It is an arithmetic number, because the mean of its divisors is an integer number (5477736766125).

Almost surely, 2^{121121220012102} is an apocalyptic number.

121121220012102 is an abundant number, since it is smaller than the sum of its proper divisors (141810144761898).

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

121121220012102 is a wasteful number, since it uses less digits than its factorization.

121121220012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092245 (or 5092242 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121121220012102 its reverse (201210022121121), we get a palindrome (322331242133223).

The spelling of 121121220012102 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, twelve thousand, one hundred two".