21011112214 has 32 divisors (see below), whose sum is σ = 33775937280. Its totient is φ = 9780540000.

The previous prime is 21011112197. The next prime is 21011112217. The reversal of 21011112214 is 41221111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011112217) 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, 235789 + ... + 312439.

It is an arithmetic number, because the mean of its divisors is an integer number (1055498040).

Almost surely, 2^21011112214 is an apocalyptic number.

21011112214 is a deficient number, since it is larger than the sum of its proper divisors (12764825066).

21011112214 is a wasteful number, since it uses less digits than its factorization.

21011112214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76836.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21011112214 its reverse (41221111012), we get a palindrome (62232223226).

It can be divided in two parts, 21011 and 112214, that added together give a square (133225 = 365²).

The spelling of 21011112214 in words is "twenty-one billion, eleven million, one hundred twelve thousand, two hundred fourteen".