121395102724 has 81 divisors (see below), whose sum is σ = 253718199189. Its totient is φ = 50673913920.

The previous prime is 121395102721. The next prime is 121395102737. The reversal of 121395102724 is 427201593121.

The square root of 121395102724 is 348418.

It is a perfect power (a square), and thus also a powerful number.

121395102724 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5849496324 + 115545606400 = 76482^2 + 339920^2 .

It is not an unprimeable number, because it can be changed into a prime (121395102721) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 199991629 + ... + 199992235.

Almost surely, 2^121395102724 is an apocalyptic number.

121395102724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

121395102724 is the 348418-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121395102724

121395102724 is an abundant number, since it is smaller than the sum of its proper divisors (132323096465).

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

121395102724 is an frugal number, since it uses more digits than its factorization.

121395102724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

Adding to 121395102724 its reverse (427201593121), we get a palindrome (548596695845).

The spelling of 121395102724 in words is "one hundred twenty-one billion, three hundred ninety-five million, one hundred two thousand, seven hundred twenty-four".