240312040222021 has 4 divisors (see below), whose sum is σ = 241531898294412. Its totient is φ = 239092182149632.

The previous prime is 240312040221863. The next prime is 240312040222057. The reversal of 240312040222021 is 120222040213042.

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

It can be written as a sum of positive squares in 2 ways, for example, as 226280235952996 + 14031804269025 = 15042614^2 + 3745905^2 .

It is a cyclic number.

It is not a de Polignac number, because 240312040222021 - 2³⁷ = 240174601268549 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 (240312040222621) 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, 609929035900 + ... + 609929036293.

It is an arithmetic number, because the mean of its divisors is an integer number (60382974573603).

Almost surely, 2^{240312040222021} is an apocalyptic number.

It is an amenable number.

240312040222021 is a deficient number, since it is larger than the sum of its proper divisors (1219858072391).

240312040222021 is a wasteful number, since it uses less digits than its factorization.

240312040222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219858072390.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 240312040222021 its reverse (120222040213042), we get a palindrome (360534080435063).

The spelling of 240312040222021 in words is "two hundred forty trillion, three hundred twelve billion, forty million, two hundred twenty-two thousand, twenty-one".