11420621472481 has 27 divisors (see below), whose sum is σ = 12637713131283. Its totient is φ = 10315946418960.

The previous prime is 11420621472451. The next prime is 11420621472517. The reversal of 11420621472481 is 18427412602411.

The square root of 11420621472481 is 3379441.

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

It can be written as a sum of positive squares in only one way, i.e., 1689441046225 + 9731180426256 = 1299785^2 + 3119484^2 .

It is not a de Polignac number, because 11420621472481 - 2¹³ = 11420621464289 is a prime.

It is a super-2 number, since 2×11420621472481² (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 (11420621472431) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2064835686 + ... + 2064841216.

Almost surely, 2^{11420621472481} is an apocalyptic number.

11420621472481 is the 3379441-st square number.

11420621472481 is the 1689721-st centered octagonal number.

It is an amenable number.

11420621472481 is a deficient number, since it is larger than the sum of its proper divisors (1217091658802).

11420621472481 is an frugal number, since it uses more digits than its factorization.

11420621472481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182 (or 5591 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 11420621472481 in words is "eleven trillion, four hundred twenty billion, six hundred twenty-one million, four hundred seventy-two thousand, four hundred eighty-one".