21000011012012 has 12 divisors (see below), whose sum is σ = 38347846196016. Its totient is φ = 10043483527440.

The previous prime is 21000011011981. The next prime is 21000011012041. The reversal of 21000011012012 is 21021011000012.

It is a junction number, because it is equal to n+sod(n) for n = 21000011011984 and 21000011012002.

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, 114130494539 + ... + 114130494722.

It is an arithmetic number, because the mean of its divisors is an integer number (3195653849668).

Almost surely, 2^{21000011012012} is an apocalyptic number.

It is an amenable number.

21000011012012 is a deficient number, since it is larger than the sum of its proper divisors (17347835184004).

21000011012012 is a wasteful number, since it uses less digits than its factorization.

21000011012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228260989288 (or 228260989286 counting only the distinct ones).

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

Adding to 21000011012012 its reverse (21021011000012), we get a palindrome (42021022012024).

The spelling of 21000011012012 in words is "twenty-one trillion, eleven million, twelve thousand, twelve".