21221223119 has 2 divisors, whose sum is σ = 21221223120. Its totient is φ = 21221223118.

The previous prime is 21221223113. The next prime is 21221223137. The reversal of 21221223119 is 91132212212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221223119 - 2⁴ = 21221223103 is a prime.

It is a super-2 number, since 2×21221223119² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221223113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610611559 + 10610611560.

It is an arithmetic number, because the mean of its divisors is an integer number (10610611560).

Almost surely, 2^21221223119 is an apocalyptic number.

21221223119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221223119 is an equidigital number, since it uses as much as digits as its factorization.

21221223119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The spelling of 21221223119 in words is "twenty-one billion, two hundred twenty-one million, two hundred twenty-three thousand, one hundred nineteen".