21113002311 has 8 divisors (see below), whose sum is σ = 28292131200. Its totient is φ = 14004604152.

The previous prime is 21113002307. The next prime is 21113002349. The reversal of 21113002311 is 11320031112.

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 21113002311 - 2² = 21113002307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113002411) 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, 17681985 + ... + 17683178.

It is an arithmetic number, because the mean of its divisors is an integer number (3536516400).

Almost surely, 2^21113002311 is an apocalyptic number.

21113002311 is a deficient number, since it is larger than the sum of its proper divisors (7179128889).

21113002311 is a wasteful number, since it uses less digits than its factorization.

21113002311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35365365.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21113002311 its reverse (11320031112), we get a palindrome (32433033423).

The spelling of 21113002311 in words is "twenty-one billion, one hundred thirteen million, two thousand, three hundred eleven".