21236012419 has 2 divisors, whose sum is σ = 21236012420. Its totient is φ = 21236012418.

The previous prime is 21236012407. The next prime is 21236012423. The reversal of 21236012419 is 91421063212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21236012419 - 2¹¹ = 21236010371 is a prime.

It is a super-2 number, since 2×21236012419² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21236012459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10618006209 + 10618006210.

It is an arithmetic number, because the mean of its divisors is an integer number (10618006210).

Almost surely, 2^21236012419 is an apocalyptic number.

21236012419 is a deficient number, since it is larger than the sum of its proper divisors (1).

21236012419 is an equidigital number, since it uses as much as digits as its factorization.

21236012419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 21236012419 in words is "twenty-one billion, two hundred thirty-six million, twelve thousand, four hundred nineteen".