1201112022221 has 2 divisors, whose sum is σ = 1201112022222. Its totient is φ = 1201112022220.

The previous prime is 1201112022197. The next prime is 1201112022233. The reversal of 1201112022221 is 1222202111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1191341688196 + 9770334025 = 1091486^2 + 98845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201112022221 - 2³⁸ = 926234115277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201112022221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201112022821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600556011110 + 600556011111.

It is an arithmetic number, because the mean of its divisors is an integer number (600556011111).

Almost surely, 2^{1201112022221} is an apocalyptic number.

It is an amenable number.

1201112022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201112022221 is an equidigital number, since it uses as much as digits as its factorization.

1201112022221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1201112022221 its reverse (1222202111021), we get a palindrome (2423314133242).

The spelling of 1201112022221 in words is "one trillion, two hundred one billion, one hundred twelve million, twenty-two thousand, two hundred twenty-one".