121525230042 has 80 divisors (see below), whose sum is σ = 285152472000. Its totient is φ = 38609923968.

The previous prime is 121525230023. The next prime is 121525230053. The reversal of 121525230042 is 240032525121.

It is a super-2 number, since 2×121525230042² (a number of 23 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 121525229988 and 121525230015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 996834 + ... + 1112082.

It is an arithmetic number, because the mean of its divisors is an integer number (3564405900).

Almost surely, 2^121525230042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121525230042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142576236000).

121525230042 is an abundant number, since it is smaller than the sum of its proper divisors (163627241958).

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

121525230042 is a wasteful number, since it uses less digits than its factorization.

121525230042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115569 (or 115560 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 121525230042 its reverse (240032525121), we get a palindrome (361557755163).

The spelling of 121525230042 in words is "one hundred twenty-one billion, five hundred twenty-five million, two hundred thirty thousand, forty-two".