221225940180851 has 2 divisors, whose sum is σ = 221225940180852. Its totient is φ = 221225940180850.

The previous prime is 221225940180823. The next prime is 221225940180901. The reversal of 221225940180851 is 158081049522122.

It is an a-pointer prime, because the next prime (221225940180901) can be obtained adding 221225940180851 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221225940180851 - 2⁴⁶ = 150857196003187 is a prime.

It is a super-3 number, since 3×221225940180851³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221225940180851.

It is not a weakly prime, because it can be changed into another prime (221225940180821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110612970090425 + 110612970090426.

It is an arithmetic number, because the mean of its divisors is an integer number (110612970090426).

Almost surely, 2^{221225940180851} is an apocalyptic number.

221225940180851 is a deficient number, since it is larger than the sum of its proper divisors (1).

221225940180851 is an equidigital number, since it uses as much as digits as its factorization.

221225940180851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921600, while the sum is 50.

The spelling of 221225940180851 in words is "two hundred twenty-one trillion, two hundred twenty-five billion, nine hundred forty million, one hundred eighty thousand, eight hundred fifty-one".