102112321121 has 4 divisors (see below), whose sum is σ = 102118628544. Its totient is φ = 102106013700.

The previous prime is 102112321079. The next prime is 102112321123. The reversal of 102112321121 is 121123211201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121123211201 = 1277 ⋅94849813.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102112321121 is a prime.

It is a super-2 number, since 2×102112321121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102112321121.

It is not an unprimeable number, because it can be changed into a prime (102112321123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3129365 + ... + 3161826.

It is an arithmetic number, because the mean of its divisors is an integer number (25529657136).

Almost surely, 2^102112321121 is an apocalyptic number.

It is an amenable number.

102112321121 is a deficient number, since it is larger than the sum of its proper divisors (6307423).

102112321121 is an equidigital number, since it uses as much as digits as its factorization.

102112321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6307422.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 102112321121 its reverse (121123211201), we get a palindrome (223235532322).

It can be divided in two parts, 10211 and 2321121, that added together give a palindrome (2331332).

The spelling of 102112321121 in words is "one hundred two billion, one hundred twelve million, three hundred twenty-one thousand, one hundred twenty-one".