3121021151345 has 8 divisors (see below), whose sum is σ = 3745561072320. Its totient is φ = 2496593127280.

The previous prime is 3121021151341. The next prime is 3121021151383. The reversal of 3121021151345 is 5431511201213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3121021151345 - 2² = 3121021151341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3121021151341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27912851 + ... + 28024440.

It is an arithmetic number, because the mean of its divisors is an integer number (468195134040).

Almost surely, 2^{3121021151345} is an apocalyptic number.

It is an amenable number.

3121021151345 is a deficient number, since it is larger than the sum of its proper divisors (624539920975).

3121021151345 is a wasteful number, since it uses less digits than its factorization.

3121021151345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55948455.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 3121021151345 its reverse (5431511201213), we get a palindrome (8552532352558).

The spelling of 3121021151345 in words is "three trillion, one hundred twenty-one billion, twenty-one million, one hundred fifty-one thousand, three hundred forty-five".