212122122122 has 4 divisors (see below), whose sum is σ = 318183183186. Its totient is φ = 106061061060.

The previous prime is 212122122061. The next prime is 212122122151. The reversal of 212122122122 is 221221221212.

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., 208008054241 + 4114067881 = 456079^2 + 64141^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 212122122094 and 212122122103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53030530529 + ... + 53030530532.

Almost surely, 2^212122122122 is an apocalyptic number.

212122122122 is a deficient number, since it is larger than the sum of its proper divisors (106061061064).

212122122122 is a wasteful number, since it uses less digits than its factorization.

212122122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106061061063.

The product of its digits is 256, while the sum is 20.

Adding to 212122122122 its reverse (221221221212), we get a palindrome (433343343334).

The spelling of 212122122122 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-two".