221020021201919 has 2 divisors, whose sum is σ = 221020021201920. Its totient is φ = 221020021201918.

The previous prime is 221020021201913. The next prime is 221020021202003. The reversal of 221020021201919 is 919102120020122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020021201919 is a prime.

It is a super-2 number, since 2×221020021201919² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020021201913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510010600959 + 110510010600960.

It is an arithmetic number, because the mean of its divisors is an integer number (110510010600960).

Almost surely, 2^{221020021201919} is an apocalyptic number.

221020021201919 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020021201919 is an equidigital number, since it uses as much as digits as its factorization.

221020021201919 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 32.

The spelling of 221020021201919 in words is "two hundred twenty-one trillion, twenty billion, twenty-one million, two hundred one thousand, nine hundred nineteen".