3111321012 has 12 divisors (see below), whose sum is σ = 7259749056. Its totient is φ = 1037107000.

The previous prime is 3111320987. The next prime is 3111321013. The reversal of 3111321012 is 2101231113.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 3111320982 and 3111321000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111321013) 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, 129638364 + ... + 129638387.

It is an arithmetic number, because the mean of its divisors is an integer number (604979088).

Almost surely, 2^3111321012 is an apocalyptic number.

It is an amenable number.

3111321012 is an abundant number, since it is smaller than the sum of its proper divisors (4148428044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3111321012 is a wasteful number, since it uses less digits than its factorization.

3111321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259276758 (or 259276756 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 3111321012 is about 55779.2166671423. The cubic root of 3111321012 is about 1459.8725434491.

Adding to 3111321012 its reverse (2101231113), we get a palindrome (5212552125).

It can be divided in two parts, 31113 and 21012, that added together give a palindrome (52125).

The spelling of 3111321012 in words is "three billion, one hundred eleven million, three hundred twenty-one thousand, twelve".