1200220101257 has 2 divisors, whose sum is σ = 1200220101258. Its totient is φ = 1200220101256.

The previous prime is 1200220101163. The next prime is 1200220101263. The reversal of 1200220101257 is 7521010220021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1048553472121 + 151666629136 = 1023989^2 + 389444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200220101257 - 2³² = 1195925133961 is a prime.

It is a super-2 number, since 2×1200220101257² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1200220101557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600110050628 + 600110050629.

It is an arithmetic number, because the mean of its divisors is an integer number (600110050629).

Almost surely, 2^{1200220101257} is an apocalyptic number.

It is an amenable number.

1200220101257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200220101257 is an equidigital number, since it uses as much as digits as its factorization.

1200220101257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 1200220101257 its reverse (7521010220021), we get a palindrome (8721230321278).

The spelling of 1200220101257 in words is "one trillion, two hundred billion, two hundred twenty million, one hundred one thousand, two hundred fifty-seven".