21222186711 has 16 divisors (see below), whose sum is σ = 30899831808. Its totient is φ = 12848932800.

The previous prime is 21222186707. The next prime is 21222186719. The reversal of 21222186711 is 11768122212.

It is not a de Polignac number, because 21222186711 - 2² = 21222186707 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222186719) 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, 291766 + ... + 357171.

It is an arithmetic number, because the mean of its divisors is an integer number (1931239488).

Almost surely, 2^21222186711 is an apocalyptic number.

21222186711 is a deficient number, since it is larger than the sum of its proper divisors (9677645097).

21222186711 is a wasteful number, since it uses less digits than its factorization.

21222186711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649942.

The product of its digits is 5376, while the sum is 33.

The spelling of 21222186711 in words is "twenty-one billion, two hundred twenty-two million, one hundred eighty-six thousand, seven hundred eleven".