21010020022312 has 8 divisors (see below), whose sum is σ = 39393787541850. Its totient is φ = 10505010011152.

The previous prime is 21010020022279. The next prime is 21010020022319. The reversal of 21010020022312 is 21322002001012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18941871155076 + 2068148867236 = 4352226^2 + 1438106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21010020022312² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21010020022319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313126251387 + ... + 1313126251402.

Almost surely, 2^{21010020022312} is an apocalyptic number.

It is an amenable number.

21010020022312 is a deficient number, since it is larger than the sum of its proper divisors (18383767519538).

21010020022312 is a wasteful number, since it uses less digits than its factorization.

21010020022312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626252502795 (or 2626252502791 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21010020022312 its reverse (21322002001012), we get a palindrome (42332022023324).

The spelling of 21010020022312 in words is "twenty-one trillion, ten billion, twenty million, twenty-two thousand, three hundred twelve".