21221101102011 has 8 divisors (see below), whose sum is σ = 28294890201600. Its totient is φ = 14147356368552.

The previous prime is 21221101102007. The next prime is 21221101102049. The reversal of 21221101102011 is 11020110112212.

It is a happy number.

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

It is not a de Polignac number, because 21221101102011 - 2² = 21221101102007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21221101100011) 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, 9958935 + ... + 11900528.

It is an arithmetic number, because the mean of its divisors is an integer number (3536861275200).

Almost surely, 2^{21221101102011} is an apocalyptic number.

21221101102011 is a deficient number, since it is larger than the sum of its proper divisors (7073789099589).

21221101102011 is a wasteful number, since it uses less digits than its factorization.

21221101102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22183065.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21221101102011 its reverse (11020110112212), we get a palindrome (32241211214223).

The spelling of 21221101102011 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred one million, one hundred two thousand, eleven".