212021113111 has 16 divisors (see below), whose sum is σ = 230918929920. Its totient is φ = 193898390400.

The previous prime is 212021113079. The next prime is 212021113163. The reversal of 212021113111 is 111311120212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212021113111 - 2⁵ = 212021113079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021114111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843465 + ... + 1065586.

It is an arithmetic number, because the mean of its divisors is an integer number (14432433120).

Almost surely, 2^212021113111 is an apocalyptic number.

212021113111 is a deficient number, since it is larger than the sum of its proper divisors (18897816809).

212021113111 is a wasteful number, since it uses less digits than its factorization.

212021113111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909254.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 212021113111 its reverse (111311120212), we get a palindrome (323332233323).

The spelling of 212021113111 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, one hundred eleven".