20021102312 has 16 divisors (see below), whose sum is σ = 38154970500. Its totient is φ = 9846443520.

The previous prime is 20021102221. The next prime is 20021102327. The reversal of 20021102312 is 21320112002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15004780036 + 5016322276 = 122494^2 + 70826^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20512937 + ... + 20513912.

Almost surely, 2^20021102312 is an apocalyptic number.

It is an amenable number.

20021102312 is a deficient number, since it is larger than the sum of its proper divisors (18133868188).

20021102312 is a wasteful number, since it uses less digits than its factorization.

20021102312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41026916 (or 41026912 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20021102312 its reverse (21320112002), we get a palindrome (41341214314).

The spelling of 20021102312 in words is "twenty billion, twenty-one million, one hundred two thousand, three hundred twelve".