121823257442 has 8 divisors (see below), whose sum is σ = 187191834732. Its totient is φ = 59425979200.

The previous prime is 121823257421. The next prime is 121823257453. The reversal of 121823257442 is 244752328121.

It can be written as a sum of positive squares in 2 ways, for example, as 121681671241 + 141586201 = 348829^2 + 11899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 121823257442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742824659 + ... + 742824822.

Almost surely, 2^121823257442 is an apocalyptic number.

121823257442 is a deficient number, since it is larger than the sum of its proper divisors (65368577290).

121823257442 is a wasteful number, since it uses less digits than its factorization.

121823257442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485649524.

The product of its digits is 215040, while the sum is 41.

The spelling of 121823257442 in words is "one hundred twenty-one billion, eight hundred twenty-three million, two hundred fifty-seven thousand, four hundred forty-two".