20012212122 has 32 divisors (see below), whose sum is σ = 45792497664. Its totient is φ = 5711487600.

The previous prime is 20012212069. The next prime is 20012212123. The reversal of 20012212122 is 22121221002.

It is not an unprimeable number, because it can be changed into a prime (20012212123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223254 + ... + 299777.

It is an arithmetic number, because the mean of its divisors is an integer number (1431015552).

Almost surely, 2^20012212122 is an apocalyptic number.

20012212122 is an abundant number, since it is smaller than the sum of its proper divisors (25780285542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20012212122 is a wasteful number, since it uses less digits than its factorization.

20012212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523954.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20012212122 its reverse (22121221002), we get a palindrome (42133433124).

The spelling of 20012212122 in words is "twenty billion, twelve million, two hundred twelve thousand, one hundred twenty-two".