2000001202121 has 4 divisors (see below), whose sum is σ = 2153847448452. Its totient is φ = 1846154955792.

The previous prime is 2000001202117. The next prime is 2000001202139. The reversal of 2000001202121 is 1212021000002.

It is a happy number.

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 323545953721 + 1676455248400 = 568811^2 + 1294780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000001202121 - 2² = 2000001202117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2000001202151) 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, 76923123146 + ... + 76923123171.

It is an arithmetic number, because the mean of its divisors is an integer number (538461862113).

Almost surely, 2^{2000001202121} is an apocalyptic number.

It is an amenable number.

2000001202121 is a deficient number, since it is larger than the sum of its proper divisors (153846246331).

2000001202121 is a wasteful number, since it uses less digits than its factorization.

2000001202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153846246330.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2000001202121 its reverse (1212021000002), we get a palindrome (3212022202123).

The spelling of 2000001202121 in words is "two trillion, one million, two hundred two thousand, one hundred twenty-one".