121010420142 has 96 divisors (see below), whose sum is σ = 271777615200. Its totient is φ = 38886973440.

The previous prime is 121010420123. The next prime is 121010420143. The reversal of 121010420142 is 241024010121.

121010420142 is a `hidden beast` number, since 1 + 2 + 101 + 0 + 420 + 142 = 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 (121010420143) 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 47 ways as a sum of consecutive naturals, for example, 35454028 + ... + 35457440.

It is an arithmetic number, because the mean of its divisors is an integer number (2831016825).

Almost surely, 2^121010420142 is an apocalyptic number.

121010420142 is an abundant number, since it is smaller than the sum of its proper divisors (150767195058).

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

121010420142 is a wasteful number, since it uses less digits than its factorization.

121010420142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4018 (or 4015 counting only the distinct ones).

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

Adding to 121010420142 its reverse (241024010121), we get a palindrome (362034430263).

The spelling of 121010420142 in words is "one hundred twenty-one billion, ten million, four hundred twenty thousand, one hundred forty-two".