2121303132101 has 4 divisors (see below), whose sum is σ = 2122233122604. Its totient is φ = 2120373141600.

The previous prime is 2121303132029. The next prime is 2121303132121. The reversal of 2121303132101 is 1012313031212.

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 847045963201 + 1274257168900 = 920351^2 + 1128830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121303132101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121303132121) 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, 464991830 + ... + 464996391.

It is an arithmetic number, because the mean of its divisors is an integer number (530558280651).

Almost surely, 2^{2121303132101} is an apocalyptic number.

It is an amenable number.

2121303132101 is a deficient number, since it is larger than the sum of its proper divisors (929990503).

2121303132101 is an equidigital number, since it uses as much as digits as its factorization.

2121303132101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929990502.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2121303132101 its reverse (1012313031212), we get a palindrome (3133616163313).

The spelling of 2121303132101 in words is "two trillion, one hundred twenty-one billion, three hundred three million, one hundred thirty-two thousand, one hundred one".