991021000112002 has 16 divisors (see below), whose sum is σ = 1487016865396800. Its totient is φ = 495348727213872.

The previous prime is 991021000111991. The next prime is 991021000112041. The reversal of 991021000112002 is 200211000120199.

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, 123779683 + ... + 131542585.

It is an arithmetic number, because the mean of its divisors is an integer number (92938554087300).

Almost surely, 2^{991021000112002} is an apocalyptic number.

991021000112002 is a deficient number, since it is larger than the sum of its proper divisors (495995865284798).

991021000112002 is a wasteful number, since it uses less digits than its factorization.

991021000112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7783737.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 991021000112002 in words is "nine hundred ninety-one trillion, twenty-one billion, one hundred twelve thousand, two".