2231022121 has 8 divisors (see below), whose sum is σ = 2289716424. Its totient is φ = 2172942720.

The previous prime is 2231022107. The next prime is 2231022139. The reversal of 2231022121 is 1212201322.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1190250000 + 1040772121 = 34500^2 + 32261^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2231022121 - 2⁵ = 2231022089 is a prime.

It is a super-3 number, since 3×2231022121³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2231022095 and 2231022104.

It is not an unprimeable number, because it can be changed into a prime (2231022151) 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, 146370 + ... + 160891.

It is an arithmetic number, because the mean of its divisors is an integer number (286214553).

Almost surely, 2^2231022121 is an apocalyptic number.

It is an amenable number.

2231022121 is a deficient number, since it is larger than the sum of its proper divisors (58694303).

2231022121 is a wasteful number, since it uses less digits than its factorization.

2231022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307451.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2231022121 is about 47233.6968805111. The cubic root of 2231022121 is about 1306.6761336243.

Adding to 2231022121 its reverse (1212201322), we get a palindrome (3443223443).

The spelling of 2231022121 in words is "two billion, two hundred thirty-one million, twenty-two thousand, one hundred twenty-one".