321121100111 has 48 divisors (see below), whose sum is σ = 382728665088. Its totient is φ = 268582406400.

The previous prime is 321121100081. The next prime is 321121100141. The reversal of 321121100111 is 111001121123.

It is an interprime number because it is at equal distance from previous prime (321121100081) and next prime (321121100141).

It is a de Polignac number, because none of the positive numbers 2^k-321121100111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321121100141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152116946 + ... + 152119056.

It is an arithmetic number, because the mean of its divisors is an integer number (7973513856).

Almost surely, 2^321121100111 is an apocalyptic number.

321121100111 is a deficient number, since it is larger than the sum of its proper divisors (61607564977).

321121100111 is a wasteful number, since it uses less digits than its factorization.

321121100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652 (or 2645 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 321121100111 its reverse (111001121123), we get a palindrome (432122221234).

The spelling of 321121100111 in words is "three hundred twenty-one billion, one hundred twenty-one million, one hundred thousand, one hundred eleven".