221012020319 has 2 divisors, whose sum is σ = 221012020320. Its totient is φ = 221012020318.

The previous prime is 221012020297. The next prime is 221012020351. The reversal of 221012020319 is 913020210122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221012020319 - 2¹² = 221012016223 is a prime.

It is a super-2 number, since 2×221012020319² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221012020294 and 221012020303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012023319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506010159 + 110506010160.

It is an arithmetic number, because the mean of its divisors is an integer number (110506010160).

Almost surely, 2^221012020319 is an apocalyptic number.

221012020319 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012020319 is an equidigital number, since it uses as much as digits as its factorization.

221012020319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 221012020319 in words is "two hundred twenty-one billion, twelve million, twenty thousand, three hundred nineteen".