121212320001 has 4 divisors (see below), whose sum is σ = 161616426672. Its totient is φ = 80808213332.

The previous prime is 121212319979. The next prime is 121212320003. The reversal of 121212320001 is 100023212121.

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 121212320001 - 2¹⁵ = 121212287233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121212320003) 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, 20202053331 + ... + 20202053336.

It is an arithmetic number, because the mean of its divisors is an integer number (40404106668).

Almost surely, 2^121212320001 is an apocalyptic number.

It is an amenable number.

121212320001 is a deficient number, since it is larger than the sum of its proper divisors (40404106671).

121212320001 is an equidigital number, since it uses as much as digits as its factorization.

121212320001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40404106670.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121212320001 its reverse (100023212121), we get a palindrome (221235532122).

The spelling of 121212320001 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred twenty thousand, one".