21211012311 has 16 divisors (see below), whose sum is σ = 30574435200. Its totient is φ = 13034361888.

The previous prime is 21211012301. The next prime is 21211012357. The reversal of 21211012311 is 11321011212.

It is not a de Polignac number, because 21211012311 - 2⁹ = 21211011799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211012301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5026581 + ... + 5030798.

It is an arithmetic number, because the mean of its divisors is an integer number (1910902200).

Almost surely, 2^21211012311 is an apocalyptic number.

21211012311 is a deficient number, since it is larger than the sum of its proper divisors (9363422889).

21211012311 is a wasteful number, since it uses less digits than its factorization.

21211012311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10057438.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21211012311 its reverse (11321011212), we get a palindrome (32532023523).

The spelling of 21211012311 in words is "twenty-one billion, two hundred eleven million, twelve thousand, three hundred eleven".