21140402311 has 8 divisors (see below), whose sum is σ = 24163190144. Its totient is φ = 18118297080.

The previous prime is 21140402303. The next prime is 21140402317. The reversal of 21140402311 is 11320404112.

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 21140402311 - 2³ = 21140402303 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 (21140402317) 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, 102465 + ... + 229738.

It is an arithmetic number, because the mean of its divisors is an integer number (3020398768).

Almost surely, 2^21140402311 is an apocalyptic number.

21140402311 is a deficient number, since it is larger than the sum of its proper divisors (3022787833).

21140402311 is an equidigital number, since it uses as much as digits as its factorization.

21140402311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341301.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21140402311 its reverse (11320404112), we get a palindrome (32460806423).

The spelling of 21140402311 in words is "twenty-one billion, one hundred forty million, four hundred two thousand, three hundred eleven".