1002111998 has 16 divisors (see below), whose sum is σ = 1523751360. Its totient is φ = 494208000.

The previous prime is 1002111973. The next prime is 1002112019. The reversal of 1002111998 is 8991112001.

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, 187118 + ... + 192398.

It is an arithmetic number, because the mean of its divisors is an integer number (95234460).

Almost surely, 2^1002111998 is an apocalyptic number.

1002111998 is a deficient number, since it is larger than the sum of its proper divisors (521639362).

1002111998 is a wasteful number, since it uses less digits than its factorization.

1002111998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 1002111998 is about 31656.1526089321. The cubic root of 1002111998 is about 1000.7035042990.

Adding to 1002111998 its reverse (8991112001), we get a palindrome (9993223999).

The spelling of 1002111998 in words is "one billion, two million, one hundred eleven thousand, nine hundred ninety-eight".