203978780122 has 16 divisors (see below), whose sum is σ = 343830453120. Its totient is φ = 90050832432.

The previous prime is 203978780113. The next prime is 203978780147. The reversal of 203978780122 is 221087879302.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170550222 + ... + 170551417.

It is an arithmetic number, because the mean of its divisors is an integer number (21489403320).

Almost surely, 2^203978780122 is an apocalyptic number.

203978780122 is a deficient number, since it is larger than the sum of its proper divisors (139851672998).

203978780122 is a wasteful number, since it uses less digits than its factorization.

203978780122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341101677.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 203978780122 in words is "two hundred three billion, nine hundred seventy-eight million, seven hundred eighty thousand, one hundred twenty-two".