3121021201242 has 64 divisors (see below), whose sum is σ = 7553807207424. Its totient is φ = 839220499200.

The previous prime is 3121021201237. The next prime is 3121021201247. The reversal of 3121021201242 is 2421021201213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3121021201237) and next prime (3121021201247).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (3121021201247) 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 31 ways as a sum of consecutive naturals, for example, 14207413 + ... + 14425415.

It is an arithmetic number, because the mean of its divisors is an integer number (118028237616).

Almost surely, 2^{3121021201242} is an apocalyptic number.

3121021201242 is an abundant number, since it is smaller than the sum of its proper divisors (4432786006182).

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

3121021201242 is a wasteful number, since it uses less digits than its factorization.

3121021201242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238083.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 3121021201242 its reverse (2421021201213), we get a palindrome (5542042402455).

The spelling of 3121021201242 in words is "three trillion, one hundred twenty-one billion, twenty-one million, two hundred one thousand, two hundred forty-two".