212021210111 has 8 divisors (see below), whose sum is σ = 213420303360. Its totient is φ = 210626609272.

The previous prime is 212021210101. The next prime is 212021210129. The reversal of 212021210111 is 111012120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212021210111 - 2¹⁰ = 212021209087 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 (212021210101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028375 + ... + 1217208.

It is an arithmetic number, because the mean of its divisors is an integer number (26677537920).

Almost surely, 2^212021210111 is an apocalyptic number.

212021210111 is a deficient number, since it is larger than the sum of its proper divisors (1399093249).

212021210111 is a wasteful number, since it uses less digits than its factorization.

212021210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246205.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212021210111 its reverse (111012120212), we get a palindrome (323033330323).

The spelling of 212021210111 in words is "two hundred twelve billion, twenty-one million, two hundred ten thousand, one hundred eleven".