31122003001 has 4 divisors (see below), whose sum is σ = 31141227600. Its totient is φ = 31102778404.

The previous prime is 31122002981. The next prime is 31122003013. The reversal of 31122003001 is 10030022113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10030022113 = 9041 ⋅1109393.

It is a cyclic number.

It is not a de Polignac number, because 31122003001 - 2¹⁵ = 31121970233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31122003091) 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, 9609871 + ... + 9613108.

It is an arithmetic number, because the mean of its divisors is an integer number (7785306900).

Almost surely, 2^31122003001 is an apocalyptic number.

It is an amenable number.

31122003001 is a deficient number, since it is larger than the sum of its proper divisors (19224599).

31122003001 is a wasteful number, since it uses less digits than its factorization.

31122003001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19224598.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31122003001 its reverse (10030022113), we get a palindrome (41152025114).

The spelling of 31122003001 in words is "thirty-one billion, one hundred twenty-two million, three thousand, one".