11221971547941 has 72 divisors (see below), whose sum is σ = 20596762184544. Its totient is φ = 5822052143040.

The previous prime is 11221971547937. The next prime is 11221971547957. The reversal of 11221971547941 is 14974517912211.

11221971547941 is a `hidden beast` number, since 1 + 1 + 2 + 2 + 1 + 9 + 7 + 1 + 547 + 94 + 1 = 666.

It is not a de Polignac number, because 11221971547941 - 2² = 11221971547937 is a prime.

It is a super-2 number, since 2×11221971547941² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221971547981) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2253490 + ... + 5246156.

It is an arithmetic number, because the mean of its divisors is an integer number (286066141452).

Almost surely, 2^{11221971547941} is an apocalyptic number.

11221971547941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221971547941 is a deficient number, since it is larger than the sum of its proper divisors (9374790636603).

11221971547941 is a wasteful number, since it uses less digits than its factorization.

11221971547941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2993471 (or 2993461 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 54.

The spelling of 11221971547941 in words is "eleven trillion, two hundred twenty-one billion, nine hundred seventy-one million, five hundred forty-seven thousand, nine hundred forty-one".