31112020201 has 4 divisors (see below), whose sum is σ = 31870850004. Its totient is φ = 30353190400.

The previous prime is 31112020187. The next prime is 31112020217. The reversal of 31112020201 is 10202021113.

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 14202918976 + 16909101225 = 119176^2 + 130035^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112020201 - 2¹⁷ = 31111889129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112020271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379414840 + ... + 379414921.

It is an arithmetic number, because the mean of its divisors is an integer number (7967712501).

Almost surely, 2^31112020201 is an apocalyptic number.

It is an amenable number.

31112020201 is a deficient number, since it is larger than the sum of its proper divisors (758829803).

31112020201 is an equidigital number, since it uses as much as digits as its factorization.

31112020201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758829802.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31112020201 its reverse (10202021113), we get a palindrome (41314041314).

The spelling of 31112020201 in words is "thirty-one billion, one hundred twelve million, twenty thousand, two hundred one".