21010211012 has 12 divisors (see below), whose sum is σ = 42020422080. Its totient is φ = 9004376136.

The previous prime is 21010211009. The next prime is 21010211041. The reversal of 21010211012 is 21011201012.

21010211012 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21010210984 and 21010211002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375182312 + ... + 375182367.

It is an arithmetic number, because the mean of its divisors is an integer number (3501701840).

Almost surely, 2^21010211012 is an apocalyptic number.

It is an amenable number.

21010211012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010211012 is a wasteful number, since it uses less digits than its factorization.

21010211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750364690 (or 750364688 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21010211012 its reverse (21011201012), we get a palindrome (42021412024).

The spelling of 21010211012 in words is "twenty-one billion, ten million, two hundred eleven thousand, twelve".