1220200357 has 2 divisors, whose sum is σ = 1220200358. Its totient is φ = 1220200356.

The previous prime is 1220200351. The next prime is 1220200361. The reversal of 1220200357 is 7530020221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 728514081 + 491686276 = 26991^2 + 22174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220200357 is a prime.

It is a super-2 number, since 2×1220200357² = 2977777822445854898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220200351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610100178 + 610100179.

It is an arithmetic number, because the mean of its divisors is an integer number (610100179).

Almost surely, 2^1220200357 is an apocalyptic number.

It is an amenable number.

1220200357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220200357 is an equidigital number, since it uses as much as digits as its factorization.

1220200357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 1220200357 is about 34931.3663775123. The cubic root of 1220200357 is about 1068.5882207753.

Adding to 1220200357 its reverse (7530020221), we get a palindrome (8750220578).

The spelling of 1220200357 in words is "one billion, two hundred twenty million, two hundred thousand, three hundred fifty-seven".