1121899142 has 32 divisors (see below), whose sum is σ = 2072976192. Its totient is φ = 443447424.

The previous prime is 1121899127. The next prime is 1121899159. The reversal of 1121899142 is 2419981211.

It is a junction number, because it is equal to n+sod(n) for n = 1121899096 and 1121899105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313628 + ... + 317184.

It is an arithmetic number, because the mean of its divisors is an integer number (64780506).

Almost surely, 2^1121899142 is an apocalyptic number.

1121899142 is a deficient number, since it is larger than the sum of its proper divisors (951077050).

1121899142 is a wasteful number, since it uses less digits than its factorization.

1121899142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312.

The product of its digits is 10368, while the sum is 38.

The square root of 1121899142 is about 33494.7629040720. The cubic root of 1121899142 is about 1039.0854700771.

The spelling of 1121899142 in words is "one billion, one hundred twenty-one million, eight hundred ninety-nine thousand, one hundred forty-two".