1201222212137 has 2 divisors, whose sum is σ = 1201222212138. Its totient is φ = 1201222212136.

The previous prime is 1201222212007. The next prime is 1201222212161. The reversal of 1201222212137 is 7312122221021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 694362224656 + 506859987481 = 833284^2 + 711941^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201222212137 - 2²⁴ = 1201205434921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201222232137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600611106068 + 600611106069.

It is an arithmetic number, because the mean of its divisors is an integer number (600611106069).

Almost surely, 2^{1201222212137} is an apocalyptic number.

It is an amenable number.

1201222212137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201222212137 is an equidigital number, since it uses as much as digits as its factorization.

1201222212137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 1201222212137 its reverse (7312122221021), we get a palindrome (8513344433158).

The spelling of 1201222212137 in words is "one trillion, two hundred one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred thirty-seven".