212120010001111 has 8 divisors (see below), whose sum is σ = 213430694690304. Its totient is φ = 210813267221760.

The previous prime is 212120010001021. The next prime is 212120010001213. The reversal of 212120010001111 is 111100010021212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212120010001111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212120010001091 and 212120010001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120010011111) 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, 985369506 + ... + 985584751.

It is an arithmetic number, because the mean of its divisors is an integer number (26678836836288).

Almost surely, 2^{212120010001111} is an apocalyptic number.

212120010001111 is a deficient number, since it is larger than the sum of its proper divisors (1310684689193).

212120010001111 is a wasteful number, since it uses less digits than its factorization.

212120010001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970954921.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212120010001111 its reverse (111100010021212), we get a palindrome (323220020022323).

The spelling of 212120010001111 in words is "two hundred twelve trillion, one hundred twenty billion, ten million, one thousand, one hundred eleven".