121212021201001 has 4 divisors (see below), whose sum is σ = 121213503654100. Its totient is φ = 121210538747904.

The previous prime is 121212021200993. The next prime is 121212021201013. The reversal of 121212021201001 is 100102120212121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55751623823401 + 65460397377600 = 7466701^2 + 8090760^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212021201001 - 2³ = 121212021200993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212021201071) 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, 741103896 + ... + 741267433.

It is an arithmetic number, because the mean of its divisors is an integer number (30303375913525).

Almost surely, 2^{121212021201001} is an apocalyptic number.

It is an amenable number.

121212021201001 is a deficient number, since it is larger than the sum of its proper divisors (1482453099).

121212021201001 is an equidigital number, since it uses as much as digits as its factorization.

121212021201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482453098.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121212021201001 its reverse (100102120212121), we get a palindrome (221314141413122).

The spelling of 121212021201001 in words is "one hundred twenty-one trillion, two hundred twelve billion, twenty-one million, two hundred one thousand, one".