201321122810 has 16 divisors (see below), whose sum is σ = 362383929000. Its totient is φ = 80527136256.

The previous prime is 201321122801. The next prime is 201321122861. The reversal of 201321122810 is 18221123102.

It can be written as a sum of positive squares in 4 ways, for example, as 187491598009 + 13829524801 = 433003^2 + 117599^2 .

It is a super-2 number, since 2×201321122810² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693206 + ... + 939774.

Almost surely, 2^201321122810 is an apocalyptic number.

201321122810 is a deficient number, since it is larger than the sum of its proper divisors (161062806190).

201321122810 is a wasteful number, since it uses less digits than its factorization.

201321122810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328225.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 201321122810 its reverse (18221123102), we get a palindrome (219542245912).

The spelling of 201321122810 in words is "two hundred one billion, three hundred twenty-one million, one hundred twenty-two thousand, eight hundred ten".