210221001019 has 2 divisors, whose sum is σ = 210221001020. Its totient is φ = 210221001018.

The previous prime is 210221001007. The next prime is 210221001031. The reversal of 210221001019 is 910100122012.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (210221001007) and next prime (210221001031).

It is a cyclic number.

It is not a de Polignac number, because 210221001019 - 2¹¹ = 210220998971 is a prime.

It is a super-2 number, since 2×210221001019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210221000987 and 210221001005.

It is not a weakly prime, because it can be changed into another prime (210221001619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110500509 + 105110500510.

It is an arithmetic number, because the mean of its divisors is an integer number (105110500510).

Almost surely, 2^210221001019 is an apocalyptic number.

210221001019 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221001019 is an equidigital number, since it uses as much as digits as its factorization.

210221001019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 210221001019 in words is "two hundred ten billion, two hundred twenty-one million, one thousand, nineteen".