121716066938 has 4 divisors (see below), whose sum is σ = 182574100410. Its totient is φ = 60858033468.

The previous prime is 121716066929. The next prime is 121716066943. The reversal of 121716066938 is 839660617121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 109684828969 + 12031237969 = 331187^2 + 109687^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30429016733 + ... + 30429016736.

Almost surely, 2^121716066938 is an apocalyptic number.

121716066938 is a deficient number, since it is larger than the sum of its proper divisors (60858033472).

121716066938 is an equidigital number, since it uses as much as digits as its factorization.

121716066938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60858033471.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 121716066938 in words is "one hundred twenty-one billion, seven hundred sixteen million, sixty-six thousand, nine hundred thirty-eight".