281321270961 has 16 divisors (see below), whose sum is σ = 391699927680. Its totient is φ = 179257415040.

The previous prime is 281321270959. The next prime is 281321270987. The reversal of 281321270961 is 169072123182.

It is not a de Polignac number, because 281321270961 - 2¹ = 281321270959 is a prime.

It is a super-2 number, since 2×281321270961² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (281321270911) 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, 1452046 + ... + 1634343.

It is an arithmetic number, because the mean of its divisors is an integer number (24481245480).

Almost surely, 2^281321270961 is an apocalyptic number.

It is an amenable number.

281321270961 is a deficient number, since it is larger than the sum of its proper divisors (110378656719).

281321270961 is a wasteful number, since it uses less digits than its factorization.

281321270961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3087736.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 281321270961 in words is "two hundred eighty-one billion, three hundred twenty-one million, two hundred seventy thousand, nine hundred sixty-one".