31122242201 has 4 divisors (see below), whose sum is σ = 31709454372. Its totient is φ = 30535030032.

The previous prime is 31122242191. The next prime is 31122242233. The reversal of 31122242201 is 10224222113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10224222113 = 7 ⋅1460603159.

It can be written as a sum of positive squares in 2 ways, for example, as 28589737225 + 2532504976 = 169085^2 + 50324^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122242201 - 2¹⁰ = 31122241177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31122242101) 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, 293606006 + ... + 293606111.

It is an arithmetic number, because the mean of its divisors is an integer number (7927363593).

Almost surely, 2^31122242201 is an apocalyptic number.

It is an amenable number.

31122242201 is a deficient number, since it is larger than the sum of its proper divisors (587212171).

31122242201 is an equidigital number, since it uses as much as digits as its factorization.

31122242201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587212170.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31122242201 its reverse (10224222113), we get a palindrome (41346464314).

The spelling of 31122242201 in words is "thirty-one billion, one hundred twenty-two million, two hundred forty-two thousand, two hundred one".