121325011542 has 128 divisors (see below), whose sum is σ = 316802534400. Its totient is φ = 33690359808.

The previous prime is 121325011517. The next prime is 121325011589. The reversal of 121325011542 is 245110523121.

It is a happy number.

121325011542 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 2 + 501 + 154 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14247478 + ... + 14255990.

It is an arithmetic number, because the mean of its divisors is an integer number (2475019800).

Almost surely, 2^121325011542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121325011542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158401267200).

121325011542 is an abundant number, since it is smaller than the sum of its proper divisors (195477522858).

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

121325011542 is a wasteful number, since it uses less digits than its factorization.

121325011542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9587 (or 9581 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 121325011542 its reverse (245110523121), we get a palindrome (366435534663).

The spelling of 121325011542 in words is "one hundred twenty-one billion, three hundred twenty-five million, eleven thousand, five hundred forty-two".