131211022220001 has 6 divisors (see below), whose sum is σ = 189527032095570. Its totient is φ = 87474014813328.

The previous prime is 131211022219999. The next prime is 131211022220011. The reversal of 131211022220001 is 100022220112131.

131211022220001 is a `hidden beast` number, since 1 + 31 + 211 + 0 + 222 + 200 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 126319953816225 + 4891068403776 = 11239215^2 + 2211576^2 .

It is not a de Polignac number, because 131211022220001 - 2¹ = 131211022219999 is a prime.

It is a super-5 number, since 5×131211022220001⁵ (a number of 72 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (131211022220011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7289501234436 + ... + 7289501234453.

It is an arithmetic number, because the mean of its divisors is an integer number (31587838682595).

Almost surely, 2^{131211022220001} is an apocalyptic number.

It is an amenable number.

131211022220001 is a deficient number, since it is larger than the sum of its proper divisors (58316009875569).

131211022220001 is a wasteful number, since it uses less digits than its factorization.

131211022220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14579002468895 (or 14579002468892 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 131211022220001 its reverse (100022220112131), we get a palindrome (231233242332132).

The spelling of 131211022220001 in words is "one hundred thirty-one trillion, two hundred eleven billion, twenty-two million, two hundred twenty thousand, one".