999998555211112 has 16 divisors (see below), whose sum is σ = 1973681358969600. Its totient is φ = 473683526152560.

The previous prime is 999998555211031. The next prime is 999998555211119. The reversal of 999998555211112 is 211112555899999.

It is a happy number.

It is a super-2 number, since 2×999998555211112² (a number of 31 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (76).

It is not an unprimeable number, because it can be changed into a prime (999998555211119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3289468931464 + ... + 3289468931767.

It is an arithmetic number, because the mean of its divisors is an integer number (123355084935600).

Almost surely, 2^{999998555211112} is an apocalyptic number.

It is an amenable number.

999998555211112 is a deficient number, since it is larger than the sum of its proper divisors (973682803758488).

999998555211112 is a wasteful number, since it uses less digits than its factorization.

999998555211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6578937863256 (or 6578937863252 counting only the distinct ones).

The product of its digits is 236196000, while the sum is 76.

The spelling of 999998555211112 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, five hundred fifty-five million, two hundred eleven thousand, one hundred twelve".