11212100001999 has 120 divisors (see below), whose sum is σ = 19277638416960. Its totient is φ = 6453849737088.

The previous prime is 11212100001997. The next prime is 11212100002001. The reversal of 11212100001999 is 99910000121211.

It is an interprime number because it is at equal distance from previous prime (11212100001997) and next prime (11212100002001).

It is not a de Polignac number, because 11212100001999 - 2¹ = 11212100001997 is a prime.

It is a super-2 number, since 2×11212100001999² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212100001997) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 29843829 + ... + 30217185.

It is an arithmetic number, because the mean of its divisors is an integer number (160646986808).

Almost surely, 2^{11212100001999} is an apocalyptic number.

11212100001999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11212100001999 is a deficient number, since it is larger than the sum of its proper divisors (8065538414961).

11212100001999 is a wasteful number, since it uses less digits than its factorization.

11212100001999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373499 (or 373471 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 36.

The spelling of 11212100001999 in words is "eleven trillion, two hundred twelve billion, one hundred million, one thousand, nine hundred ninety-nine".