1220222211251 has 2 divisors, whose sum is σ = 1220222211252. Its totient is φ = 1220222211250.

The previous prime is 1220222211209. The next prime is 1220222211287. The reversal of 1220222211251 is 1521122220221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1521122220221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220222211251 - 2¹⁰ = 1220222210227 is a prime.

It is a super-3 number, since 3×1220222211251³ (a number of 37 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1220222211151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610111105625 + 610111105626.

It is an arithmetic number, because the mean of its divisors is an integer number (610111105626).

Almost surely, 2^{1220222211251} is an apocalyptic number.

1220222211251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220222211251 is an equidigital number, since it uses as much as digits as its factorization.

1220222211251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 1220222211251 its reverse (1521122220221), we get a palindrome (2741344431472).

The spelling of 1220222211251 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred eleven thousand, two hundred fifty-one".