1220020111201 has 2 divisors, whose sum is σ = 1220020111202. Its totient is φ = 1220020111200.

The previous prime is 1220020111187. The next prime is 1220020111253. The reversal of 1220020111201 is 1021110200221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 785791829601 + 434228281600 = 886449^2 + 658960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220020111201 - 2⁹ = 1220020110689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220020111001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610010055600 + 610010055601.

It is an arithmetic number, because the mean of its divisors is an integer number (610010055601).

Almost surely, 2^{1220020111201} is an apocalyptic number.

It is an amenable number.

1220020111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220020111201 is an equidigital number, since it uses as much as digits as its factorization.

1220020111201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220020111201 its reverse (1021110200221), we get a palindrome (2241130311422).

The spelling of 1220020111201 in words is "one trillion, two hundred twenty billion, twenty million, one hundred eleven thousand, two hundred one".