2240123021 has 2 divisors, whose sum is σ = 2240123022. Its totient is φ = 2240123020.

The previous prime is 2240122999. The next prime is 2240123087. The reversal of 2240123021 is 1203210422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1815186025 + 424936996 = 42605^2 + 20614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240123021 - 2¹⁸ = 2239860877 is a prime.

It is a super-2 number, since 2×2240123021² = 10036302298428332882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2240123521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1120061510 + 1120061511.

It is an arithmetic number, because the mean of its divisors is an integer number (1120061511).

Almost surely, 2^2240123021 is an apocalyptic number.

It is an amenable number.

2240123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2240123021 is an equidigital number, since it uses as much as digits as its factorization.

2240123021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2240123021 is about 47329.9378934729. The cubic root of 2240123021 is about 1308.4504766041.

Adding to 2240123021 its reverse (1203210422), we get a palindrome (3443333443).

The spelling of 2240123021 in words is "two billion, two hundred forty million, one hundred twenty-three thousand, twenty-one".