21000011101012 has 24 divisors (see below), whose sum is σ = 38307469606560. Its totient is φ = 10060547558880.

The previous prime is 21000011100997. The next prime is 21000011101051. The reversal of 21000011101012 is 21010111000012.

It is a self number, because there is not a number n which added to its sum of digits gives 21000011101012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 690956478 + ... + 690986869.

It is an arithmetic number, because the mean of its divisors is an integer number (1596144566940).

Almost surely, 2^{21000011101012} is an apocalyptic number.

It is an amenable number.

21000011101012 is a deficient number, since it is larger than the sum of its proper divisors (17307458505548).

21000011101012 is a wasteful number, since it uses less digits than its factorization.

21000011101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381943511 (or 1381943509 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21000011101012 its reverse (21010111000012), we get a palindrome (42010122101024).

The spelling of 21000011101012 in words is "twenty-one trillion, eleven million, one hundred one thousand, twelve".