3111133212421 has 4 divisors (see below), whose sum is σ = 3350451151852. Its totient is φ = 2871815272992.

The previous prime is 3111133212419. The next prime is 3111133212449. The reversal of 3111133212421 is 1242123311113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 418544302500 + 2692588909921 = 646950^2 + 1640911^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111133212421 - 2¹ = 3111133212419 is a prime.

It is a super-2 number, since 2×3111133212421² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111133216421) 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, 119658969696 + ... + 119658969721.

It is an arithmetic number, because the mean of its divisors is an integer number (837612787963).

Almost surely, 2^{3111133212421} is an apocalyptic number.

It is an amenable number.

3111133212421 is a deficient number, since it is larger than the sum of its proper divisors (239317939431).

3111133212421 is a wasteful number, since it uses less digits than its factorization.

3111133212421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239317939430.

The product of its digits is 864, while the sum is 25.

Adding to 3111133212421 its reverse (1242123311113), we get a palindrome (4353256523534).

The spelling of 3111133212421 in words is "three trillion, one hundred eleven billion, one hundred thirty-three million, two hundred twelve thousand, four hundred twenty-one".