212011112121122 has 4 divisors (see below), whose sum is σ = 318016668181686. Its totient is φ = 106005556060560.

The previous prime is 212011112121119. The next prime is 212011112121157. The reversal of 212011112121122 is 221121211110212.

It is a happy number.

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., 199996701396361 + 12014410724761 = 14142019^2 + 3466181^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212011112121094 and 212011112121103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53002778030279 + ... + 53002778030282.

Almost surely, 2^{212011112121122} is an apocalyptic number.

212011112121122 is a deficient number, since it is larger than the sum of its proper divisors (106005556060564).

212011112121122 is a wasteful number, since it uses less digits than its factorization.

212011112121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106005556060563.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 212011112121122 its reverse (221121211110212), we get a palindrome (433132323231334).

The spelling of 212011112121122 in words is "two hundred twelve trillion, eleven billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-two".