121321102001 has 4 divisors (see below), whose sum is σ = 132350293104. Its totient is φ = 110291910900.

The previous prime is 121321101977. The next prime is 121321102003. The reversal of 121321102001 is 100201123121.

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.

It is a cyclic number.

It is not a de Polignac number, because 121321102001 - 2¹⁰ = 121321100977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121321102003) 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, 5514595535 + ... + 5514595556.

It is an arithmetic number, because the mean of its divisors is an integer number (33087573276).

Almost surely, 2^121321102001 is an apocalyptic number.

121321102001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121321102001 is a deficient number, since it is larger than the sum of its proper divisors (11029191103).

121321102001 is a wasteful number, since it uses less digits than its factorization.

121321102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11029191102.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121321102001 its reverse (100201123121), we get a palindrome (221522225122).

It can be divided in two parts, 121321 and 102001, that added together give a palindrome (223322).

The spelling of 121321102001 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred two thousand, one".