2121002232231 has 4 divisors (see below), whose sum is σ = 2828002976312. Its totient is φ = 1414001488152.

The previous prime is 2121002232199. The next prime is 2121002232253. The reversal of 2121002232231 is 1322322001212.

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

It is not a de Polignac number, because 2121002232231 - 2⁵ = 2121002232199 is a prime.

It is a super-2 number, since 2×2121002232231² (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 = 2121002232198 and 2121002232207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121002222231) 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, 353500372036 + ... + 353500372041.

It is an arithmetic number, because the mean of its divisors is an integer number (707000744078).

Almost surely, 2^{2121002232231} is an apocalyptic number.

2121002232231 is a deficient number, since it is larger than the sum of its proper divisors (707000744081).

2121002232231 is an equidigital number, since it uses as much as digits as its factorization.

2121002232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707000744080.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2121002232231 its reverse (1322322001212), we get a palindrome (3443324233443).

The spelling of 2121002232231 in words is "two trillion, one hundred twenty-one billion, two million, two hundred thirty-two thousand, two hundred thirty-one".