201021100021012 has 12 divisors (see below), whose sum is σ = 351787325620276. Its totient is φ = 100510435558080.

The previous prime is 201021100020989. The next prime is 201021100021013. The reversal of 201021100021012 is 210120001120102.

It can be written as a sum of positive squares in 2 ways, for example, as 35392076367376 + 165629023653636 = 5949124^2 + 12869694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201021100020983 and 201021100021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201021100021013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24598689 + ... + 31735432.

Almost surely, 2^{201021100021012} is an apocalyptic number.

It is an amenable number.

201021100021012 is a deficient number, since it is larger than the sum of its proper divisors (150766225599264).

201021100021012 is a wasteful number, since it uses less digits than its factorization.

201021100021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57226218 (or 57226216 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201021100021012 its reverse (210120001120102), we get a palindrome (411141101141114).

The spelling of 201021100021012 in words is "two hundred one trillion, twenty-one billion, one hundred million, twenty-one thousand, twelve".