3111012021 has 16 divisors (see below), whose sum is σ = 4523644160. Its totient is φ = 1890233280.

The previous prime is 3111011989. The next prime is 3111012043. The reversal of 3111012021 is 1202101113.

It is not a de Polignac number, because 3111012021 - 2⁵ = 3111011989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3111011988 and 3111012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111012071) 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, 501790 + ... + 507951.

It is an arithmetic number, because the mean of its divisors is an integer number (282727760).

Almost surely, 2^3111012021 is an apocalyptic number.

It is an amenable number.

3111012021 is a deficient number, since it is larger than the sum of its proper divisors (1412632139).

3111012021 is a wasteful number, since it uses less digits than its factorization.

3111012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009836.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 3111012021 is about 55776.4468301809. The cubic root of 3111012021 is about 1459.8242143086.

Adding to 3111012021 its reverse (1202101113), we get a palindrome (4313113134).

The spelling of 3111012021 in words is "three billion, one hundred eleven million, twelve thousand, twenty-one".