1990110111 has 24 divisors (see below), whose sum is σ = 2987794992. Its totient is φ = 1176700800.

The previous prime is 1990110107. The next prime is 1990110127. The reversal of 1990110111 is 1110110991.

It is not a de Polignac number, because 1990110111 - 2² = 1990110107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990110611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51976 + ... + 81741.

It is an arithmetic number, because the mean of its divisors is an integer number (124491458).

Almost surely, 2^1990110111 is an apocalyptic number.

1990110111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1990110111 is a deficient number, since it is larger than the sum of its proper divisors (997684881).

1990110111 is a wasteful number, since it uses less digits than its factorization.

1990110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133783 (or 133772 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 24.

The square root of 1990110111 is about 44610.6501970101. The cubic root of 1990110111 is about 1257.8408707722.

It can be divided in two parts, 1990 and 110111, that added together give a triangular number (112101 = T₄₇₃).

The spelling of 1990110111 in words is "one billion, nine hundred ninety million, one hundred ten thousand, one hundred eleven".