121051392818 has 8 divisors (see below), whose sum is σ = 181588016748. Its totient is φ = 60522053904.

The previous prime is 121051392793. The next prime is 121051392821. The reversal of 121051392818 is 818293150121.

It can be written as a sum of positive squares in 2 ways, for example, as 120661053769 + 390339049 = 347363^2 + 19757^2 .

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

It is a super-2 number, since 2×121051392818² (a number of 23 digits) contains 22 as substring.

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, 1779521 + ... + 1846292.

Almost surely, 2^121051392818 is an apocalyptic number.

121051392818 is a deficient number, since it is larger than the sum of its proper divisors (60536623930).

121051392818 is a wasteful number, since it uses less digits than its factorization.

121051392818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642508.

The product of its (nonzero) digits is 34560, while the sum is 41.

The spelling of 121051392818 in words is "one hundred twenty-one billion, fifty-one million, three hundred ninety-two thousand, eight hundred eighteen".