1202112221 has 2 divisors, whose sum is σ = 1202112222. Its totient is φ = 1202112220.

The previous prime is 1202112187. The next prime is 1202112253. The reversal of 1202112221 is 1222112021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1188525625 + 13586596 = 34475^2 + 3686^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202112221 - 2³⁰ = 128370397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202112196 and 1202112205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202112281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601056110 + 601056111.

It is an arithmetic number, because the mean of its divisors is an integer number (601056111).

Almost surely, 2^1202112221 is an apocalyptic number.

It is an amenable number.

1202112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202112221 is an equidigital number, since it uses as much as digits as its factorization.

1202112221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1202112221 is about 34671.4900314365. The cubic root of 1202112221 is about 1063.2816953159.

Adding to 1202112221 its reverse (1222112021), we get a palindrome (2424224242).

It can be divided in two parts, 12021 and 12221, that added together give a palindrome (24242).

The spelling of 1202112221 in words is "one billion, two hundred two million, one hundred twelve thousand, two hundred twenty-one".