3111421221 has 32 divisors (see below), whose sum is σ = 4705257600. Its totient is φ = 2031638400.

The previous prime is 3111421193. The next prime is 3111421231. The reversal of 3111421221 is 1221241113.

It is not a de Polignac number, because 3111421221 - 2⁹ = 3111420709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3111421194 and 3111421203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111421231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251071 + ... + 263171.

It is an arithmetic number, because the mean of its divisors is an integer number (147039300).

Almost surely, 2^3111421221 is an apocalyptic number.

It is an amenable number.

3111421221 is a deficient number, since it is larger than the sum of its proper divisors (1593836379).

3111421221 is a wasteful number, since it uses less digits than its factorization.

3111421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12306 (or 12300 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 3111421221 is about 55780.1149245858. The cubic root of 3111421221 is about 1459.8882164056. Note that the first 3 decimals are identical.

Adding to 3111421221 its reverse (1221241113), we get a palindrome (4332662334).

The spelling of 3111421221 in words is "three billion, one hundred eleven million, four hundred twenty-one thousand, two hundred twenty-one".