21112202211 has 16 divisors (see below), whose sum is σ = 29339781120. Its totient is φ = 13488528960.

The previous prime is 21112202117. The next prime is 21112202213. The reversal of 21112202211 is 11220221112.

It is a de Polignac number, because none of the positive numbers 2^k-21112202211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112202213) 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, 1092426 + ... + 1111583.

It is an arithmetic number, because the mean of its divisors is an integer number (1833736320).

Almost surely, 2^21112202211 is an apocalyptic number.

21112202211 is a deficient number, since it is larger than the sum of its proper divisors (8227578909).

21112202211 is a wasteful number, since it uses less digits than its factorization.

21112202211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204146.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112202211 its reverse (11220221112), we get a palindrome (32332423323).

The spelling of 21112202211 in words is "twenty-one billion, one hundred twelve million, two hundred two thousand, two hundred eleven".