2121233013021 has 8 divisors (see below), whose sum is σ = 2828322724864. Its totient is φ = 1414149321600.

The previous prime is 2121233013013. The next prime is 2121233013049. The reversal of 2121233013021 is 1203103321212.

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

It is not a de Polignac number, because 2121233013021 - 2³ = 2121233013013 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 (2121233013091) 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, 606301 + ... + 2147106.

It is an arithmetic number, because the mean of its divisors is an integer number (353540340608).

Almost surely, 2^{2121233013021} is an apocalyptic number.

It is an amenable number.

2121233013021 is a deficient number, since it is larger than the sum of its proper divisors (707089711843).

2121233013021 is a wasteful number, since it uses less digits than its factorization.

2121233013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010211.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2121233013021 its reverse (1203103321212), we get a palindrome (3324336334233).

The spelling of 2121233013021 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-three million, thirteen thousand, twenty-one".