212111121999 has 32 divisors (see below), whose sum is σ = 332025832960. Its totient is φ = 117904470912.

The previous prime is 212111121949. The next prime is 212111122033. The reversal of 212111121999 is 999121111212.

It is not a de Polignac number, because 212111121999 - 2²³ = 212102733391 is a prime.

It is a super-2 number, since 2×212111121999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111121919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3805272 + ... + 3860610.

It is an arithmetic number, because the mean of its divisors is an integer number (10375807280).

Almost surely, 2^212111121999 is an apocalyptic number.

212111121999 is a deficient number, since it is larger than the sum of its proper divisors (119914710961).

212111121999 is a wasteful number, since it uses less digits than its factorization.

212111121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60319.

The product of its digits is 5832, while the sum is 39.

The spelling of 212111121999 in words is "two hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, nine hundred ninety-nine".