21201101011012 has 24 divisors (see below), whose sum is σ = 40461692297600. Its totient is φ = 9661261218336.

The previous prime is 21201101010983. The next prime is 21201101011127. The reversal of 21201101011012 is 21011010110212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 21201101010983 and 21201101011001.

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, 2580460962 + ... + 2580469177.

Almost surely, 2^{21201101011012} is an apocalyptic number.

It is an amenable number.

21201101011012 is a deficient number, since it is larger than the sum of its proper divisors (19260591286588).

21201101011012 is a wasteful number, since it uses less digits than its factorization.

21201101011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160930235 (or 5160930233 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21201101011012 its reverse (21011010110212), we get a palindrome (42212111121224).

The spelling of 21201101011012 in words is "twenty-one trillion, two hundred one billion, one hundred one million, eleven thousand, twelve".