121001010102 has 48 divisors (see below), whose sum is σ = 304699898880. Its totient is φ = 33985753776.

The previous prime is 121001010101. The next prime is 121001010157. The reversal of 121001010102 is 201010100121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001010101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8130918 + ... + 8145785.

It is an arithmetic number, because the mean of its divisors is an integer number (6347914560).

Almost surely, 2^121001010102 is an apocalyptic number.

121001010102 is an abundant number, since it is smaller than the sum of its proper divisors (183698888778).

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

121001010102 is a wasteful number, since it uses less digits than its factorization.

121001010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16276777 (or 16276774 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121001010102 its reverse (201010100121), we get a palindrome (322011110223).

The spelling of 121001010102 in words is "one hundred twenty-one billion, one million, ten thousand, one hundred two".