2121102102331 has 4 divisors (see below), whose sum is σ = 2121137065152. Its totient is φ = 2121067139512.

The previous prime is 2121102102313. The next prime is 2121102102341. The reversal of 2121102102331 is 1332012011212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121102102331 - 2⁹ = 2121102101819 is a prime.

It is a super-2 number, since 2×2121102102331² (a number of 25 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 = 2121102102299 and 2121102102308.

It is not an unprimeable number, because it can be changed into a prime (2121102102341) 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, 17390251 + ... + 17511796.

It is an arithmetic number, because the mean of its divisors is an integer number (530284266288).

Almost surely, 2^{2121102102331} is an apocalyptic number.

2121102102331 is a deficient number, since it is larger than the sum of its proper divisors (34962821).

2121102102331 is an equidigital number, since it uses as much as digits as its factorization.

2121102102331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34962820.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2121102102331 its reverse (1332012011212), we get a palindrome (3453114113543).

The spelling of 2121102102331 in words is "two trillion, one hundred twenty-one billion, one hundred two million, one hundred two thousand, three hundred thirty-one".