102402120223 has 4 divisors (see below), whose sum is σ = 110279206408. Its totient is φ = 94525034040.

The previous prime is 102402120221. The next prime is 102402120241. The reversal of 102402120223 is 322021204201.

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

It is a cyclic number.

It is not a de Polignac number, because 102402120223 - 2¹ = 102402120221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102402120223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102402120221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3938543073 + ... + 3938543098.

It is an arithmetic number, because the mean of its divisors is an integer number (27569801602).

Almost surely, 2^102402120223 is an apocalyptic number.

102402120223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

102402120223 is a deficient number, since it is larger than the sum of its proper divisors (7877086185).

102402120223 is an equidigital number, since it uses as much as digits as its factorization.

102402120223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7877086184.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 102402120223 its reverse (322021204201), we get a palindrome (424423324424).

The spelling of 102402120223 in words is "one hundred two billion, four hundred two million, one hundred twenty thousand, two hundred twenty-three".