31001011121 has 8 divisors (see below), whose sum is σ = 31842592320. Its totient is φ = 30164913072.

The previous prime is 31001011091. The next prime is 31001011157. The reversal of 31001011121 is 12111010013.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31001011121 - 2⁶ = 31001011057 is a prime.

It is a super-2 number, since 2×31001011121² (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 (31001011621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359326 + ... + 1381943.

It is an arithmetic number, because the mean of its divisors is an integer number (3980324040).

Almost surely, 2^31001011121 is an apocalyptic number.

It is an amenable number.

31001011121 is a deficient number, since it is larger than the sum of its proper divisors (841581199).

31001011121 is a wasteful number, since it uses less digits than its factorization.

31001011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2741575.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 31001011121 its reverse (12111010013), we get a palindrome (43112021134).

The spelling of 31001011121 in words is "thirty-one billion, one million, eleven thousand, one hundred twenty-one".