21011221110013 has 8 divisors (see below), whose sum is σ = 21130868152800. Its totient is φ = 20891859282000.

The previous prime is 21011221109993. The next prime is 21011221110023. The reversal of 21011221110013 is 31001112211012.

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 21011221110013 - 2⁵ = 21011221109981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011221110023) 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, 71155938 + ... + 71450611.

It is an arithmetic number, because the mean of its divisors is an integer number (2641358519100).

Almost surely, 2^{21011221110013} is an apocalyptic number.

It is an amenable number.

21011221110013 is a deficient number, since it is larger than the sum of its proper divisors (119647042787).

21011221110013 is a wasteful number, since it uses less digits than its factorization.

21011221110013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142607387.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21011221110013 its reverse (31001112211012), we get a palindrome (52012333321025).

The spelling of 21011221110013 in words is "twenty-one trillion, eleven billion, two hundred twenty-one million, one hundred ten thousand, thirteen".