121212002002021 has 8 divisors (see below), whose sum is σ = 138528685923840. Its totient is φ = 103895488989168.

The previous prime is 121212002002001. The next prime is 121212002002099. The reversal of 121212002002021 is 120200200212121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121212002002021 - 2²³ = 121211993613413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121212002001986 and 121212002002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212002002001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41203861 + ... + 44047498.

It is an arithmetic number, because the mean of its divisors is an integer number (17316085740480).

Almost surely, 2^{121212002002021} is an apocalyptic number.

It is an amenable number.

121212002002021 is a deficient number, since it is larger than the sum of its proper divisors (17316683921819).

121212002002021 is an equidigital number, since it uses as much as digits as its factorization.

121212002002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85454483.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121212002002021 its reverse (120200200212121), we get a palindrome (241412202214142).

The spelling of 121212002002021 in words is "one hundred twenty-one trillion, two hundred twelve billion, two million, two thousand, twenty-one".