31123321201 has 16 divisors (see below), whose sum is σ = 36095488000. Its totient is φ = 26285255568.

The previous prime is 31123321121. The next prime is 31123321321. The reversal of 31123321201 is 10212332113.

It is not a de Polignac number, because 31123321201 - 2²⁹ = 30586450289 is a prime.

It is a super-2 number, since 2×31123321201² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123325201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35020 + ... + 251938.

It is an arithmetic number, because the mean of its divisors is an integer number (2255968000).

Almost surely, 2^31123321201 is an apocalyptic number.

It is an amenable number.

31123321201 is a deficient number, since it is larger than the sum of its proper divisors (4972166799).

31123321201 is a wasteful number, since it uses less digits than its factorization.

31123321201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217228.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31123321201 its reverse (10212332113), we get a palindrome (41335653314).

The spelling of 31123321201 in words is "thirty-one billion, one hundred twenty-three million, three hundred twenty-one thousand, two hundred one".