1204202221 has 2 divisors, whose sum is σ = 1204202222. Its totient is φ = 1204202220.

The previous prime is 1204202203. The next prime is 1204202239. The reversal of 1204202221 is 1222024021.

It is a balanced prime because it is at equal distance from previous prime (1204202203) and next prime (1204202239).

It can be written as a sum of positive squares in only one way, i.e., 919908900 + 284293321 = 30330^2 + 16861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204202221 - 2¹³ = 1204194029 is a prime.

It is a super-2 number, since 2×1204202221² = 2900205978122665682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1204202195 and 1204202204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1204202201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602101110 + 602101111.

It is an arithmetic number, because the mean of its divisors is an integer number (602101111).

Almost surely, 2^1204202221 is an apocalyptic number.

It is an amenable number.

1204202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204202221 is an equidigital number, since it uses as much as digits as its factorization.

1204202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1204202221 is about 34701.6169796164. The cubic root of 1204202221 is about 1063.8975479984.

Adding to 1204202221 its reverse (1222024021), we get a palindrome (2426226242).

The spelling of 1204202221 in words is "one billion, two hundred four million, two hundred two thousand, two hundred twenty-one".