21011112002011 has 8 divisors (see below), whose sum is σ = 21464455357440. Its totient is φ = 20558031080808.

The previous prime is 21011112001967. The next prime is 21011112002021. The reversal of 21011112002011 is 11020021111012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21011112002011 - 2²⁹ = 21010575131099 is a prime.

It is a super-2 number, since 2×21011112002011² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21011112001982 and 21011112002000.

It is not an unprimeable number, because it can be changed into a prime (21011112002021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65446701 + ... + 65766958.

It is an arithmetic number, because the mean of its divisors is an integer number (2683056919680).

Almost surely, 2^{21011112002011} is an apocalyptic number.

21011112002011 is a deficient number, since it is larger than the sum of its proper divisors (453343355429).

21011112002011 is a wasteful number, since it uses less digits than its factorization.

21011112002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131217113.

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

Adding to 21011112002011 its reverse (11020021111012), we get a palindrome (32031133113023).

The spelling of 21011112002011 in words is "twenty-one trillion, eleven billion, one hundred twelve million, two thousand, eleven".