21292770419281 has 9 divisors (see below), whose sum is σ = 21435417440073. Its totient is φ = 21151066533300.

The previous prime is 21292770419273. The next prime is 21292770419287. The reversal of 21292770419281 is 18291407729212.

The square root of 21292770419281 is 4614409.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 21292770419281 - 2³ = 21292770419273 is a prime.

It is a super-2 number, since 2×21292770419281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21292770419287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 696760480 + ... + 696791038.

It is an arithmetic number, because the mean of its divisors is an integer number (2381713048897).

Almost surely, 2^{21292770419281} is an apocalyptic number.

21292770419281 is the 4614409-th square number.

21292770419281 is the 2307205-th centered octagonal number.

It is an amenable number.

21292770419281 is a deficient number, since it is larger than the sum of its proper divisors (142647020792).

21292770419281 is an frugal number, since it uses more digits than its factorization.

21292770419281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61420 (or 30710 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 21292770419281 in words is "twenty-one trillion, two hundred ninety-two billion, seven hundred seventy million, four hundred nineteen thousand, two hundred eighty-one".