321512122103 has 16 divisors (see below), whose sum is σ = 345872832000. Its totient is φ = 297904252032.

The previous prime is 321512122097. The next prime is 321512122111. The reversal of 321512122103 is 301221215123.

It is a cyclic number.

It is not a de Polignac number, because 321512122103 - 2¹² = 321512118007 is a prime.

It is a super-2 number, since 2×321512122103² (a number of 24 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 (321512122123) 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, 1179503 + ... + 1426271.

It is an arithmetic number, because the mean of its divisors is an integer number (21617052000).

Almost surely, 2^321512122103 is an apocalyptic number.

321512122103 is a deficient number, since it is larger than the sum of its proper divisors (24360709897).

321512122103 is a wasteful number, since it uses less digits than its factorization.

321512122103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248294.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 321512122103 its reverse (301221215123), we get a palindrome (622733337226).

The spelling of 321512122103 in words is "three hundred twenty-one billion, five hundred twelve million, one hundred twenty-two thousand, one hundred three".