210220001002391 has 2 divisors, whose sum is σ = 210220001002392. Its totient is φ = 210220001002390.

The previous prime is 210220001002289. The next prime is 210220001002393. The reversal of 210220001002391 is 193200100022012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210220001002391 - 2¹⁸ = 210220000740247 is a prime.

Together with 210220001002393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220001002393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110000501195 + 105110000501196.

It is an arithmetic number, because the mean of its divisors is an integer number (105110000501196).

Almost surely, 2^{210220001002391} is an apocalyptic number.

210220001002391 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220001002391 is an equidigital number, since it uses as much as digits as its factorization.

210220001002391 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 210220001002391 in words is "two hundred ten trillion, two hundred twenty billion, one million, two thousand, three hundred ninety-one".