121525402442 has 4 divisors (see below), whose sum is σ = 182288103666. Its totient is φ = 60762701220.

The previous prime is 121525402423. The next prime is 121525402457. The reversal of 121525402442 is 244204525121.

121525402442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244204525121 = 433 ⋅563982737.

It can be written as a sum of positive squares in only one way, i.e., 120623541481 + 901860961 = 347309^2 + 30031^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121525402399 and 121525402408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30381350609 + ... + 30381350612.

Almost surely, 2^121525402442 is an apocalyptic number.

121525402442 is a deficient number, since it is larger than the sum of its proper divisors (60762701224).

121525402442 is an equidigital number, since it uses as much as digits as its factorization.

121525402442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60762701223.

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 121525402442 its reverse (244204525121), we get a palindrome (365729927563).

The spelling of 121525402442 in words is "one hundred twenty-one billion, five hundred twenty-five million, four hundred two thousand, four hundred forty-two".