1223201021137 has 2 divisors, whose sum is σ = 1223201021138. Its totient is φ = 1223201021136.

The previous prime is 1223201021113. The next prime is 1223201021143. The reversal of 1223201021137 is 7311201023221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 991848679056 + 231352342081 = 995916^2 + 480991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223201021137 is a prime.

It is a super-2 number, since 2×1223201021137² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1223201021837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611600510568 + 611600510569.

It is an arithmetic number, because the mean of its divisors is an integer number (611600510569).

Almost surely, 2^{1223201021137} is an apocalyptic number.

It is an amenable number.

1223201021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223201021137 is an equidigital number, since it uses as much as digits as its factorization.

1223201021137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 1223201021137 its reverse (7311201023221), we get a palindrome (8534402044358).

The spelling of 1223201021137 in words is "one trillion, two hundred twenty-three billion, two hundred one million, twenty-one thousand, one hundred thirty-seven".