202122004481 has 4 divisors (see below), whose sum is σ = 202123562052. Its totient is φ = 202120446912.

The previous prime is 202122004477. The next prime is 202122004493. The reversal of 202122004481 is 184400221202.

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 153714964225 + 48407040256 = 392065^2 + 220016^2 .

It is a cyclic number.

It is not a de Polignac number, because 202122004481 - 2² = 202122004477 is a prime.

It is a super-2 number, since 2×202122004481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202122004481.

It is not an unprimeable number, because it can be changed into a prime (202122004421) 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, 564476 + ... + 850221.

It is an arithmetic number, because the mean of its divisors is an integer number (50530890513).

Almost surely, 2^202122004481 is an apocalyptic number.

It is an amenable number.

202122004481 is a deficient number, since it is larger than the sum of its proper divisors (1557571).

202122004481 is a wasteful number, since it uses less digits than its factorization.

202122004481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557570.

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 202122004481 its reverse (184400221202), we get a palindrome (386522225683).

The spelling of 202122004481 in words is "two hundred two billion, one hundred twenty-two million, four thousand, four hundred eighty-one".