1201132201961 has 2 divisors, whose sum is σ = 1201132201962. Its totient is φ = 1201132201960.

The previous prime is 1201132201943. The next prime is 1201132202029. The reversal of 1201132201961 is 1691022311021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1194690534361 + 6441667600 = 1093019^2 + 80260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201132201961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201132201561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600566100980 + 600566100981.

It is an arithmetic number, because the mean of its divisors is an integer number (600566100981).

Almost surely, 2^{1201132201961} is an apocalyptic number.

It is an amenable number.

1201132201961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201132201961 is an equidigital number, since it uses as much as digits as its factorization.

1201132201961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

Adding to 1201132201961 its reverse (1691022311021), we get a palindrome (2892154512982).

The spelling of 1201132201961 in words is "one trillion, two hundred one billion, one hundred thirty-two million, two hundred one thousand, nine hundred sixty-one".