221012211201919 has 2 divisors, whose sum is σ = 221012211201920. Its totient is φ = 221012211201918.

The previous prime is 221012211201917. The next prime is 221012211202031. The reversal of 221012211201919 is 919102112210122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221012211201919 - 2¹ = 221012211201917 is a prime.

It is a super-2 number, since 2×221012211201919² (a number of 29 digits) contains 22 as substring.

Together with 221012211201917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012211201917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506105600959 + 110506105600960.

It is an arithmetic number, because the mean of its divisors is an integer number (110506105600960).

Almost surely, 2^{221012211201919} is an apocalyptic number.

221012211201919 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012211201919 is an equidigital number, since it uses as much as digits as its factorization.

221012211201919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 221012211201919 in words is "two hundred twenty-one trillion, twelve billion, two hundred eleven million, two hundred one thousand, nine hundred nineteen".