2231332101221 has 6 divisors (see below), whose sum is σ = 2310927777522. Its totient is φ = 2154389614160.

The previous prime is 2231332101197. The next prime is 2231332101227. The reversal of 2231332101221 is 1221012331322.

It can be written as a sum of positive squares in 3 ways, for example, as 1165296501121 + 1066035600100 = 1079489^2 + 1032490^2 .

It is not a de Polignac number, because 2231332101221 - 2²² = 2231327906917 is a prime.

It is a super-3 number, since 3×2231332101221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231332101227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1326593750 + ... + 1326595431.

It is an arithmetic number, because the mean of its divisors is an integer number (385154629587).

Almost surely, 2^{2231332101221} is an apocalyptic number.

It is an amenable number.

2231332101221 is a deficient number, since it is larger than the sum of its proper divisors (79595676301).

2231332101221 is an equidigital number, since it uses as much as digits as its factorization.

2231332101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653189239 (or 2653189210 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2231332101221 its reverse (1221012331322), we get a palindrome (3452344432543).

The spelling of 2231332101221 in words is "two trillion, two hundred thirty-one billion, three hundred thirty-two million, one hundred one thousand, two hundred twenty-one".