20211122312 has 16 divisors (see below), whose sum is σ = 38003213340. Its totient is φ = 10076932096.

The previous prime is 20211122311. The next prime is 20211122353. The reversal of 20211122312 is 21322111202.

It can be written as a sum of positive squares in 2 ways, for example, as 19413963556 + 797158756 = 139334^2 + 28234^2 .

It is a super-2 number, since 2×20211122312² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20211122311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3575633 + ... + 3581280.

Almost surely, 2^20211122312 is an apocalyptic number.

It is an amenable number.

20211122312 is a deficient number, since it is larger than the sum of its proper divisors (17792091028).

20211122312 is a wasteful number, since it uses less digits than its factorization.

20211122312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7157272 (or 7157268 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20211122312 its reverse (21322111202), we get a palindrome (41533233514).

The spelling of 20211122312 in words is "twenty billion, two hundred eleven million, one hundred twenty-two thousand, three hundred twelve".