121321121103 has 288 divisors, whose sum is σ = 236451511296. Its totient is φ = 59311719936.

The previous prime is 121321121099. The next prime is 121321121113. The reversal of 121321121103 is 301121123121.

121321121103 is a `hidden beast` number, since 121 + 321 + 121 + 103 = 666.

It is not a de Polignac number, because 121321121103 - 2² = 121321121099 is a prime.

It is a super-3 number, since 3×121321121103³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321121113) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 428696400 + ... + 428696682.

It is an arithmetic number, because the mean of its divisors is an integer number (821012192).

Almost surely, 2^121321121103 is an apocalyptic number.

121321121103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121321121103 is a deficient number, since it is larger than the sum of its proper divisors (115130390193).

121321121103 is a wasteful number, since it uses less digits than its factorization.

121321121103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121321121103 its reverse (301121123121), we get a palindrome (422442244224).

The spelling of 121321121103 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred twenty-one thousand, one hundred three".