4221221197 has 2 divisors, whose sum is σ = 4221221198. Its totient is φ = 4221221196.

The previous prime is 4221221177. The next prime is 4221221287. The reversal of 4221221197 is 7911221224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2923132356 + 1298088841 = 54066^2 + 36029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221221197 is a prime.

It is a super-2 number, since 2×4221221197² = 35637416788004225618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221221177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110610598 + 2110610599.

It is an arithmetic number, because the mean of its divisors is an integer number (2110610599).

Almost surely, 2^4221221197 is an apocalyptic number.

It is an amenable number.

4221221197 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221221197 is an equidigital number, since it uses as much as digits as its factorization.

4221221197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 4221221197 is about 64970.9257822297. The cubic root of 4221221197 is about 1616.1414541661.

The spelling of 4221221197 in words is "four billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred ninety-seven".