1220144054221 has 2 divisors, whose sum is σ = 1220144054222. Its totient is φ = 1220144054220.

The previous prime is 1220144054219. The next prime is 1220144054231. The reversal of 1220144054221 is 1224504410221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1192922684100 + 27221370121 = 1092210^2 + 164989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220144054221 - 2¹ = 1220144054219 is a prime.

Together with 1220144054219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1220144054221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220144054231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610072027110 + 610072027111.

It is an arithmetic number, because the mean of its divisors is an integer number (610072027111).

Almost surely, 2^{1220144054221} is an apocalyptic number.

It is an amenable number.

1220144054221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220144054221 is an equidigital number, since it uses as much as digits as its factorization.

1220144054221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 1220144054221 its reverse (1224504410221), we get a palindrome (2444648464442).

The spelling of 1220144054221 in words is "one trillion, two hundred twenty billion, one hundred forty-four million, fifty-four thousand, two hundred twenty-one".