21211111310 has 64 divisors (see below), whose sum is σ = 40900749120. Its totient is φ = 7892090880.

The previous prime is 21211111309. The next prime is 21211111319. The reversal of 21211111310 is 1311111212.

It is a super-2 number, since 2×21211111310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211111319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5611001 + ... + 5614779.

It is an arithmetic number, because the mean of its divisors is an integer number (639074205).

Almost surely, 2^21211111310 is an apocalyptic number.

21211111310 is a deficient number, since it is larger than the sum of its proper divisors (19689637810).

21211111310 is a wasteful number, since it uses less digits than its factorization.

21211111310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 21211111310 its reverse (1311111212), we get a palindrome (22522222522).

The spelling of 21211111310 in words is "twenty-one billion, two hundred eleven million, one hundred eleven thousand, three hundred ten".