121641423254 has 16 divisors (see below), whose sum is σ = 196575182160. Its totient is φ = 56120052960.

The previous prime is 121641423199. The next prime is 121641423317. The reversal of 121641423254 is 452324146121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855317 + ... + 987344.

It is an arithmetic number, because the mean of its divisors is an integer number (12285948885).

Almost surely, 2^121641423254 is an apocalyptic number.

121641423254 is a deficient number, since it is larger than the sum of its proper divisors (74933758906).

121641423254 is a wasteful number, since it uses less digits than its factorization.

121641423254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845215.

The product of its digits is 46080, while the sum is 35.

Adding to 121641423254 its reverse (452324146121), we get a palindrome (573965569375).

The spelling of 121641423254 in words is "one hundred twenty-one billion, six hundred forty-one million, four hundred twenty-three thousand, two hundred fifty-four".