212122112211122 has 4 divisors (see below), whose sum is σ = 318183168316686. Its totient is φ = 106061056105560.

The previous prime is 212122112211047. The next prime is 212122112211127. The reversal of 212122112211122 is 221112211221212.

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

It can be written as a sum of positive squares in only one way, i.e., 138994455947281 + 73127656263841 = 11789591^2 + 8551471^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (212122112211127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53030528052779 + ... + 53030528052782.

Almost surely, 2^{212122112211122} is an apocalyptic number.

212122112211122 is a deficient number, since it is larger than the sum of its proper divisors (106061056105564).

212122112211122 is a wasteful number, since it uses less digits than its factorization.

212122112211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106061056105563.

The product of its digits is 256, while the sum is 23.

Adding to 212122112211122 its reverse (221112211221212), we get a palindrome (433234323432334).

The spelling of 212122112211122 in words is "two hundred twelve trillion, one hundred twenty-two billion, one hundred twelve million, two hundred eleven thousand, one hundred twenty-two".