121000321021 has 4 divisors (see below), whose sum is σ = 121110023232. Its totient is φ = 120890618812.

The previous prime is 121000321003. The next prime is 121000321037. The reversal of 121000321021 is 120123000121.

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 121000321021 - 2⁵ = 121000320989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000320992 and 121000321010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000321621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54849451 + ... + 54851656.

It is an arithmetic number, because the mean of its divisors is an integer number (30277505808).

Almost surely, 2^121000321021 is an apocalyptic number.

It is an amenable number.

121000321021 is a deficient number, since it is larger than the sum of its proper divisors (109702211).

121000321021 is a wasteful number, since it uses less digits than its factorization.

121000321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109702210.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121000321021 its reverse (120123000121), we get a palindrome (241123321142).

The spelling of 121000321021 in words is "one hundred twenty-one billion, three hundred twenty-one thousand, twenty-one".