3121011011 has 4 divisors (see below), whose sum is σ = 3304599912. Its totient is φ = 2937422112.

The previous prime is 3121010933. The next prime is 3121011043. The reversal of 3121011011 is 1101101213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1101101213 = 12983 ⋅84811.

It is not a de Polignac number, because 3121011011 - 2³⁰ = 2047269187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121010983 and 3121011001.

It is not an unprimeable number, because it can be changed into a prime (3121016011) 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, 91794425 + ... + 91794458.

It is an arithmetic number, because the mean of its divisors is an integer number (826149978).

Almost surely, 2^3121011011 is an apocalyptic number.

3121011011 is a deficient number, since it is larger than the sum of its proper divisors (183588901).

3121011011 is a wasteful number, since it uses less digits than its factorization.

3121011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183588900.

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

The square root of 3121011011 is about 55866.0094422360. The cubic root of 3121011011 is about 1461.3865309196.

Adding to 3121011011 its reverse (1101101213), we get a palindrome (4222112224).

The spelling of 3121011011 in words is "three billion, one hundred twenty-one million, eleven thousand, eleven".