20212122122 has 8 divisors (see below), whose sum is σ = 30319806276. Its totient is φ = 10105520032.

The previous prime is 20212122107. The next prime is 20212122143. The reversal of 20212122122 is 22122121202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17014332721 + 3197789401 = 130439^2 + 56549^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20212122122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222083 + ... + 299574.

Almost surely, 2^20212122122 is an apocalyptic number.

20212122122 is a deficient number, since it is larger than the sum of its proper divisors (10107684154).

20212122122 is a wasteful number, since it uses less digits than its factorization.

20212122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541032.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20212122122 its reverse (22122121202), we get a palindrome (42334243324).

The spelling of 20212122122 in words is "twenty billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twenty-two".