21010221021112 has 16 divisors (see below), whose sum is σ = 39394223688600. Its totient is φ = 10505094704160.

The previous prime is 21010221021079. The next prime is 21010221021113. The reversal of 21010221021112 is 21112012201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010221021113) 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, 5211214 + ... + 8317282.

Almost surely, 2^{21010221021112} is an apocalyptic number.

It is an amenable number.

21010221021112 is a deficient number, since it is larger than the sum of its proper divisors (18384002667488).

21010221021112 is a wasteful number, since it uses less digits than its factorization.

21010221021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951606 (or 3951602 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21010221021112 its reverse (21112012201012), we get a palindrome (42122233222124).

The spelling of 21010221021112 in words is "twenty-one trillion, ten billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".