221020221221147 has 2 divisors, whose sum is σ = 221020221221148. Its totient is φ = 221020221221146.

The previous prime is 221020221221071. The next prime is 221020221221167. The reversal of 221020221221147 is 741122122020122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221020221221147 - 2³⁶ = 220951501744411 is a prime.

It is not a weakly prime, because it can be changed into another prime (221020221221167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510110610573 + 110510110610574.

It is an arithmetic number, because the mean of its divisors is an integer number (110510110610574).

Almost surely, 2^{221020221221147} is an apocalyptic number.

221020221221147 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020221221147 is an equidigital number, since it uses as much as digits as its factorization.

221020221221147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 29.

Adding to 221020221221147 its reverse (741122122020122), we get a palindrome (962142343241269).

The spelling of 221020221221147 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred forty-seven".