121220012102 has 40 divisors (see below), whose sum is σ = 213649636200. Its totient is φ = 51577398432.

The previous prime is 121220012077. The next prime is 121220012113. The reversal of 121220012102 is 201210022121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 576674 + ... + 758282.

It is an arithmetic number, because the mean of its divisors is an integer number (5341240905).

Almost surely, 2^121220012102 is an apocalyptic number.

121220012102 is a deficient number, since it is larger than the sum of its proper divisors (92429624098).

121220012102 is an equidigital number, since it uses as much as digits as its factorization.

121220012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181778 (or 181757 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121220012102 its reverse (201210022121), we get a palindrome (322430034223).

The spelling of 121220012102 in words is "one hundred twenty-one billion, two hundred twenty million, twelve thousand, one hundred two".