1201331103631 has 2 divisors, whose sum is σ = 1201331103632. Its totient is φ = 1201331103630.

The previous prime is 1201331103629. The next prime is 1201331103647. The reversal of 1201331103631 is 1363011331021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201331103631 - 2¹ = 1201331103629 is a prime.

It is a super-2 number, since 2×1201331103631² (a number of 25 digits) contains 22 as substring.

Together with 1201331103629, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1201331103596 and 1201331103605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201331143631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600665551815 + 600665551816.

It is an arithmetic number, because the mean of its divisors is an integer number (600665551816).

Almost surely, 2^{1201331103631} is an apocalyptic number.

1201331103631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201331103631 is an equidigital number, since it uses as much as digits as its factorization.

1201331103631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 1201331103631 its reverse (1363011331021), we get a palindrome (2564342434652).

The spelling of 1201331103631 in words is "one trillion, two hundred one billion, three hundred thirty-one million, one hundred three thousand, six hundred thirty-one".