21211131110 has 32 divisors (see below), whose sum is σ = 41129508672. Its totient is φ = 7829412480.

The previous prime is 21211131107. The next prime is 21211131119. The reversal of 21211131110 is 1113111212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211131119) 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, 435380 + ... + 481640.

It is an arithmetic number, because the mean of its divisors is an integer number (1285297146).

Almost surely, 2^21211131110 is an apocalyptic number.

21211131110 is a deficient number, since it is larger than the sum of its proper divisors (19918377562).

21211131110 is a wasteful number, since it uses less digits than its factorization.

21211131110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49808.

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

Adding to 21211131110 its reverse (1113111212), we get a palindrome (22324242322).

The spelling of 21211131110 in words is "twenty-one billion, two hundred eleven million, one hundred thirty-one thousand, one hundred ten".