22143002400521 has 16 divisors (see below), whose sum is σ = 22704330201168. Its totient is φ = 21582692352000.

The previous prime is 22143002400479. The next prime is 22143002400523. The reversal of 22143002400521 is 12500420034122.

It can be written as a sum of positive squares in 8 ways, for example, as 212410374400 + 21930592026121 = 460880^2 + 4683011^2 .

It is a cyclic number.

It is not a de Polignac number, because 22143002400521 - 2¹⁴ = 22143002384137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22143002400523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354818921 + ... + 354881321.

It is an arithmetic number, because the mean of its divisors is an integer number (1419020637573).

Almost surely, 2^{22143002400521} is an apocalyptic number.

It is an amenable number.

22143002400521 is a deficient number, since it is larger than the sum of its proper divisors (561327800647).

22143002400521 is a wasteful number, since it uses less digits than its factorization.

22143002400521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70412.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 22143002400521 its reverse (12500420034122), we get a palindrome (34643422434643).

The spelling of 22143002400521 in words is "twenty-two trillion, one hundred forty-three billion, two million, four hundred thousand, five hundred twenty-one".