21011000011012 has 24 divisors (see below), whose sum is σ = 40165895593152. Its totient is φ = 9537600626400.

The previous prime is 21011000010977. The next prime is 21011000011037.

21011000011012 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 21011000011012.

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, 321315039 + ... + 321380422.

It is an arithmetic number, because the mean of its divisors is an integer number (1673578983048).

Almost surely, 2^{21011000011012} is an apocalyptic number.

21011000011012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21011000011012 is a deficient number, since it is larger than the sum of its proper divisors (19154895582140).

21011000011012 is a wasteful number, since it uses less digits than its factorization.

21011000011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642696219 (or 642696217 counting only the distinct ones).

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

It can be divided in two parts, 210110000 and 11012, that added together give a palindrome (210121012).

The spelling of 21011000011012 in words is "twenty-one trillion, eleven billion, eleven thousand, twelve".