3121111302342 has 64 divisors (see below), whose sum is σ = 6884058267648. Its totient is φ = 935508420000.

The previous prime is 3121111302329. The next prime is 3121111302349. The reversal of 3121111302342 is 2432031111213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121111302349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2211967 + ... + 3336917.

It is an arithmetic number, because the mean of its divisors is an integer number (107563410432).

Almost surely, 2^{3121111302342} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121111302342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3442029133824).

3121111302342 is an abundant number, since it is smaller than the sum of its proper divisors (3762946965306).

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

3121111302342 is a wasteful number, since it uses less digits than its factorization.

3121111302342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125425.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 3121111302342 its reverse (2432031111213), we get a palindrome (5553142413555).

The spelling of 3121111302342 in words is "three trillion, one hundred twenty-one billion, one hundred eleven million, three hundred two thousand, three hundred forty-two".