121997402 has 16 divisors (see below), whose sum is σ = 184527720. Its totient is φ = 60490752.

The previous prime is 121997387. The next prime is 121997417. The reversal of 121997402 is 204799121.

It is an interprime number because it is at equal distance from previous prime (121997387) and next prime (121997417).

It can be written as a sum of positive squares in 4 ways, for example, as 61795321 + 60202081 = 7861^2 + 7759^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180938 + ... + 181610.

Almost surely, 2^121997402 is an apocalyptic number.

121997402 is a deficient number, since it is larger than the sum of its proper divisors (62530318).

121997402 is a wasteful number, since it uses less digits than its factorization.

121997402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 121997402 is about 11045.2434106270. The cubic root of 121997402 is about 495.9640458026.

The spelling of 121997402 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, four hundred two".