102121994 has 8 divisors (see below), whose sum is σ = 164966340. Its totient is φ = 47133216.

The previous prime is 102121951. The next prime is 102122011. The reversal of 102121994 is 499121201.

It can be written as a sum of positive squares in 2 ways, for example, as 100741369 + 1380625 = 10037^2 + 1175^2 .

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

It is a Curzon number.

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, 1963859 + ... + 1963910.

Almost surely, 2^102121994 is an apocalyptic number.

102121994 is a deficient number, since it is larger than the sum of its proper divisors (62844346).

102121994 is a wasteful number, since it uses less digits than its factorization.

102121994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927784.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 102121994 is about 10105.5427365382. The cubic root of 102121994 is about 467.4190718485.

The spelling of 102121994 in words is "one hundred two million, one hundred twenty-one thousand, nine hundred ninety-four".