21110201221013 has 4 divisors (see below), whose sum is σ = 21129621830400. Its totient is φ = 21090780611628.

The previous prime is 21110201220967. The next prime is 21110201221037. The reversal of 21110201221013 is 31012210201112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21110201221013 - 2²⁶ = 21110134112149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110201220982 and 21110201221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110201221913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9710303063 + ... + 9710305236.

It is an arithmetic number, because the mean of its divisors is an integer number (5282405457600).

Almost surely, 2^{21110201221013} is an apocalyptic number.

It is an amenable number.

21110201221013 is a deficient number, since it is larger than the sum of its proper divisors (19420609387).

21110201221013 is a wasteful number, since it uses less digits than its factorization.

21110201221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19420609386.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21110201221013 its reverse (31012210201112), we get a palindrome (52122411422125).

The spelling of 21110201221013 in words is "twenty-one trillion, one hundred ten billion, two hundred one million, two hundred twenty-one thousand, thirteen".