12021012100121 has 4 divisors (see below), whose sum is σ = 12021033147600. Its totient is φ = 12020991052644.

The previous prime is 12021012100099. The next prime is 12021012100129. The reversal of 12021012100121 is 12100121012021.

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 12021012100121 - 2¹⁴ = 12021012083737 is a prime.

It is a super-2 number, since 2×12021012100121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021012100096 and 12021012100105.

It is not an unprimeable number, because it can be changed into a prime (12021012100129) 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, 9642431 + ... + 10817508.

It is an arithmetic number, because the mean of its divisors is an integer number (3005258286900).

Almost surely, 2^{12021012100121} is an apocalyptic number.

It is an amenable number.

12021012100121 is a deficient number, since it is larger than the sum of its proper divisors (21047479).

12021012100121 is an equidigital number, since it uses as much as digits as its factorization.

12021012100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21047478.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12021012100121 its reverse (12100121012021), we get a palindrome (24121133112142).

The spelling of 12021012100121 in words is "twelve trillion, twenty-one billion, twelve million, one hundred thousand, one hundred twenty-one".