211212210999 has 32 divisors (see below), whose sum is σ = 293599088640. Its totient is φ = 134913542400.

The previous prime is 211212210973. The next prime is 211212211037. The reversal of 211212210999 is 999012212112.

It is a happy number.

It is not a de Polignac number, because 211212210999 - 2⁷ = 211212210871 is a prime.

It is a super-2 number, since 2×211212210999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212210919) 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, 4077142 + ... + 4128620.

It is an arithmetic number, because the mean of its divisors is an integer number (9174971520).

Almost surely, 2^211212210999 is an apocalyptic number.

211212210999 is a deficient number, since it is larger than the sum of its proper divisors (82386877641).

211212210999 is a wasteful number, since it uses less digits than its factorization.

211212210999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51951.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 211212210999 in words is "two hundred eleven billion, two hundred twelve million, two hundred ten thousand, nine hundred ninety-nine".