20011213122 has 16 divisors (see below), whose sum is σ = 40023836832. Its totient is φ = 6670169280.

The previous prime is 20011213091. The next prime is 20011213133. The reversal of 20011213122 is 22131211002.

It is a super-2 number, since 2×20011213122² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252297 + ... + 321987.

It is an arithmetic number, because the mean of its divisors is an integer number (2501489802).

Almost surely, 2^20011213122 is an apocalyptic number.

20011213122 is an abundant number, since it is smaller than the sum of its proper divisors (20012623710).

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

20011213122 is a wasteful number, since it uses less digits than its factorization.

20011213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117553.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20011213122 its reverse (22131211002), we get a palindrome (42142424124).

The spelling of 20011213122 in words is "twenty billion, eleven million, two hundred thirteen thousand, one hundred twenty-two".