121313252542 has 16 divisors (see below), whose sum is σ = 182225513520. Its totient is φ = 60571450368.

The previous prime is 121313252539. The next prime is 121313252549. The reversal of 121313252542 is 245252313121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313252549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12531408 + ... + 12541084.

It is an arithmetic number, because the mean of its divisors is an integer number (11389094595).

Almost surely, 2^121313252542 is an apocalyptic number.

121313252542 is a deficient number, since it is larger than the sum of its proper divisors (60912260978).

121313252542 is an equidigital number, since it uses as much as digits as its factorization.

121313252542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17835.

The product of its digits is 14400, while the sum is 31.

Adding to 121313252542 its reverse (245252313121), we get a palindrome (366565565663).

The spelling of 121313252542 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred fifty-two thousand, five hundred forty-two".