2031281188201 has 4 divisors (see below), whose sum is σ = 2086180679812. Its totient is φ = 1976381696592.

The previous prime is 2031281188171. The next prime is 2031281188217. The reversal of 2031281188201 is 1028811821302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 904819488400 + 1126461699801 = 951220^2 + 1061349^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031281188201 - 2⁷ = 2031281188073 is a prime.

It is a super-2 number, since 2×2031281188201² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 54899491573 = 2031281188201 / (2 + 0 + 3 + 1 + 2 + 8 + 1 + 1 + 8 + 8 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031281198201) 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 in 3 ways as a sum of consecutive naturals, for example, 27449745750 + ... + 27449745823.

It is an arithmetic number, because the mean of its divisors is an integer number (521545169953).

Almost surely, 2^{2031281188201} is an apocalyptic number.

It is an amenable number.

2031281188201 is a deficient number, since it is larger than the sum of its proper divisors (54899491611).

2031281188201 is an equidigital number, since it uses as much as digits as its factorization.

2031281188201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54899491610.

The product of its (nonzero) digits is 12288, while the sum is 37.

The spelling of 2031281188201 in words is "two trillion, thirty-one billion, two hundred eighty-one million, one hundred eighty-eight thousand, two hundred one".