121240134 has 24 divisors (see below), whose sum is σ = 268797672. Its totient is φ = 39473280.

The previous prime is 121240129. The next prime is 121240139. The reversal of 121240134 is 431042121.

It is an interprime number because it is at equal distance from previous prime (121240129) and next prime (121240139).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121240139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77547 + ... + 79094.

It is an arithmetic number, because the mean of its divisors is an integer number (11199903).

Almost surely, 2^121240134 is an apocalyptic number.

121240134 is an abundant number, since it is smaller than the sum of its proper divisors (147557538).

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

121240134 is a wasteful number, since it uses less digits than its factorization.

121240134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156692 (or 156689 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121240134 is about 11010.9097716765. The cubic root of 121240134 is about 494.9357247427.

Adding to 121240134 its reverse (431042121), we get a palindrome (552282255).

The spelling of 121240134 in words is "one hundred twenty-one million, two hundred forty thousand, one hundred thirty-four".