121532610342 has 64 divisors (see below), whose sum is σ = 286179505920. Its totient is φ = 33921283200.

The previous prime is 121532610313. The next prime is 121532610349. The reversal of 121532610342 is 243016235121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121532610349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241909 + ... + 549167.

It is an arithmetic number, because the mean of its divisors is an integer number (4471554780).

Almost surely, 2^121532610342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121532610342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143089752960).

121532610342 is an abundant number, since it is smaller than the sum of its proper divisors (164646895578).

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

121532610342 is a wasteful number, since it uses less digits than its factorization.

121532610342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307749.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 121532610342 its reverse (243016235121), we get a palindrome (364548845463).

The spelling of 121532610342 in words is "one hundred twenty-one billion, five hundred thirty-two million, six hundred ten thousand, three hundred forty-two".