102104402420402 has 4 divisors (see below), whose sum is σ = 153156603630606. Its totient is φ = 51052201210200.

The previous prime is 102104402420393. The next prime is 102104402420431. The reversal of 102104402420402 is 204024204401201.

It is a happy number.

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., 74029865691721 + 28074536728681 = 8604061^2 + 5298541^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25526100605099 + ... + 25526100605102.

Almost surely, 2^{102104402420402} is an apocalyptic number.

102104402420402 is a deficient number, since it is larger than the sum of its proper divisors (51052201210204).

102104402420402 is an equidigital number, since it uses as much as digits as its factorization.

102104402420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51052201210203.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 102104402420402 its reverse (204024204401201), we get a palindrome (306128606821603).

The spelling of 102104402420402 in words is "one hundred two trillion, one hundred four billion, four hundred two million, four hundred twenty thousand, four hundred two".