121102402 has 4 divisors (see below), whose sum is σ = 181653606. Its totient is φ = 60551200.

The previous prime is 121102393. The next prime is 121102411. The reversal of 121102402 is 204201121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204201121 = 1061 ⋅192461.

It is an interprime number because it is at equal distance from previous prime (121102393) and next prime (121102411).

It can be written as a sum of positive squares in only one way, i.e., 62900761 + 58201641 = 7931^2 + 7629^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30275599 + ... + 30275602.

Almost surely, 2^121102402 is an apocalyptic number.

121102402 is a deficient number, since it is larger than the sum of its proper divisors (60551204).

121102402 is an equidigital number, since it uses as much as digits as its factorization.

121102402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60551203.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 121102402 is about 11004.6536519783. The cubic root of 121102402 is about 494.7482337004.

Adding to 121102402 its reverse (204201121), we get a palindrome (325303523).

The spelling of 121102402 in words is "one hundred twenty-one million, one hundred two thousand, four hundred two".