121210042134 has 8 divisors (see below), whose sum is σ = 242420084280. Its totient is φ = 40403347376.

The previous prime is 121210042123. The next prime is 121210042141. The reversal of 121210042134 is 431240012121.

It is a sphenic number, since it is the product of 3 distinct primes.

121210042134 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 121210042134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10100836839 + ... + 10100836850.

It is an arithmetic number, because the mean of its divisors is an integer number (30302510535).

Almost surely, 2^121210042134 is an apocalyptic number.

121210042134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121210042134 is a wasteful number, since it uses less digits than its factorization.

121210042134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201673694.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 121210042134 its reverse (431240012121), we get a palindrome (552450054255).

The spelling of 121210042134 in words is "one hundred twenty-one billion, two hundred ten million, forty-two thousand, one hundred thirty-four".