21111331307 has 8 divisors (see below), whose sum is σ = 23031639792. Its totient is φ = 19191205600.

The previous prime is 21111331301. The next prime is 21111331309. The reversal of 21111331307 is 70313311112.

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 21111331307 - 2²⁶ = 21044222443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111331301) 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, 330557 + ... + 389217.

It is an arithmetic number, because the mean of its divisors is an integer number (2878954974).

Almost surely, 2^21111331307 is an apocalyptic number.

21111331307 is a deficient number, since it is larger than the sum of its proper divisors (1920308485).

21111331307 is a wasteful number, since it uses less digits than its factorization.

21111331307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91389.

The product of its (nonzero) digits is 378, while the sum is 23.

Adding to 21111331307 its reverse (70313311112), we get a palindrome (91424642419).

The spelling of 21111331307 in words is "twenty-one billion, one hundred eleven million, three hundred thirty-one thousand, three hundred seven".