21221021119 has 2 divisors, whose sum is σ = 21221021120. Its totient is φ = 21221021118.

The previous prime is 21221021113. The next prime is 21221021149. The reversal of 21221021119 is 91112012212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221021119 - 2¹³ = 21221012927 is a prime.

It is a super-2 number, since 2×21221021119² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21221021119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221021113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610510559 + 10610510560.

It is an arithmetic number, because the mean of its divisors is an integer number (10610510560).

Almost surely, 2^21221021119 is an apocalyptic number.

21221021119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221021119 is an equidigital number, since it uses as much as digits as its factorization.

21221021119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21221021119 in words is "twenty-one billion, two hundred twenty-one million, twenty-one thousand, one hundred nineteen".