1201202220137 has 2 divisors, whose sum is σ = 1201202220138. Its totient is φ = 1201202220136.

The previous prime is 1201202220121. The next prime is 1201202220167. The reversal of 1201202220137 is 7310222021021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1180723465321 + 20478754816 = 1086611^2 + 143104^2 .

It is an emirp because it is prime and its reverse (7310222021021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201202220137 - 2⁴ = 1201202220121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201202220167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600601110068 + 600601110069.

It is an arithmetic number, because the mean of its divisors is an integer number (600601110069).

Almost surely, 2^{1201202220137} is an apocalyptic number.

It is an amenable number.

1201202220137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201202220137 is an equidigital number, since it uses as much as digits as its factorization.

1201202220137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 1201202220137 its reverse (7310222021021), we get a palindrome (8511424241158).

The spelling of 1201202220137 in words is "one trillion, two hundred one billion, two hundred two million, two hundred twenty thousand, one hundred thirty-seven".