1219890231988 has 24 divisors (see below), whose sum is σ = 2247774569600. Its totient is φ = 577686307968.

The previous prime is 1219890231979. The next prime is 1219890232003. The reversal of 1219890231988 is 8891320989121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1889868 + ... + 2451811.

Almost surely, 2^{1219890231988} is an apocalyptic number.

It is an amenable number.

1219890231988 is a deficient number, since it is larger than the sum of its proper divisors (1027884337612).

1219890231988 is a wasteful number, since it uses less digits than its factorization.

1219890231988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4345399 (or 4345397 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 61.

The spelling of 1219890231988 in words is "one trillion, two hundred nineteen billion, eight hundred ninety million, two hundred thirty-one thousand, nine hundred eighty-eight".