212012121010111 has 4 divisors (see below), whose sum is σ = 212012801395000. Its totient is φ = 212011440625224.

The previous prime is 212012121010099. The next prime is 212012121010139. The reversal of 212012121010111 is 111010121210212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212012121010111 is a prime.

It is a super-2 number, since 2×212012121010111² (a number of 29 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 (212012121310111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339724821 + ... + 340348318.

It is an arithmetic number, because the mean of its divisors is an integer number (53003200348750).

Almost surely, 2^{212012121010111} is an apocalyptic number.

212012121010111 is a deficient number, since it is larger than the sum of its proper divisors (680384889).

212012121010111 is an equidigital number, since it uses as much as digits as its factorization.

212012121010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680384888.

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

Adding to 212012121010111 its reverse (111010121210212), we get a palindrome (323022242220323).

The spelling of 212012121010111 in words is "two hundred twelve trillion, twelve billion, one hundred twenty-one million, ten thousand, one hundred eleven".