3111212232121 has 16 divisors (see below), whose sum is σ = 3576116231424. Its totient is φ = 2651437664064.

The previous prime is 3111212232119. The next prime is 3111212232143. The reversal of 3111212232121 is 1212322121113.

It is a happy number.

It is not a de Polignac number, because 3111212232121 - 2¹ = 3111212232119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3111212232092 and 3111212232101.

It is not an unprimeable number, because it can be changed into a prime (3111212232181) 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, 1303276 + ... + 2814418.

It is an arithmetic number, because the mean of its divisors is an integer number (223507264464).

Almost surely, 2^{3111212232121} is an apocalyptic number.

It is an amenable number.

3111212232121 is a deficient number, since it is larger than the sum of its proper divisors (464903999303).

3111212232121 is a wasteful number, since it uses less digits than its factorization.

3111212232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512840.

The product of its digits is 288, while the sum is 22.

Adding to 3111212232121 its reverse (1212322121113), we get a palindrome (4323534353234).

The spelling of 3111212232121 in words is "three trillion, one hundred eleven billion, two hundred twelve million, two hundred thirty-two thousand, one hundred twenty-one".