212120002221122 has 4 divisors (see below), whose sum is σ = 318180003331686. Its totient is φ = 106060001110560.

The previous prime is 212120002221077. The next prime is 212120002221139. The reversal of 212120002221122 is 221122200021212.

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., 188898388128961 + 23221614092161 = 13744031^2 + 4818881^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212120002221094 and 212120002221103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53030000555279 + ... + 53030000555282.

Almost surely, 2^{212120002221122} is an apocalyptic number.

212120002221122 is a deficient number, since it is larger than the sum of its proper divisors (106060001110564).

212120002221122 is a wasteful number, since it uses less digits than its factorization.

212120002221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106060001110563.

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

Adding to 212120002221122 its reverse (221122200021212), we get a palindrome (433242202242334).

The spelling of 212120002221122 in words is "two hundred twelve trillion, one hundred twenty billion, two million, two hundred twenty-one thousand, one hundred twenty-two".