21121150024560 has 80 divisors (see below), whose sum is σ = 69327068917536. Its totient is φ = 5300994514944.

The previous prime is 21121150024553. The next prime is 21121150024567. The reversal of 21121150024560 is 6542005112112.

It is an interprime number because it is at equal distance from previous prime (21121150024553) and next prime (21121150024567).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×21121150024560² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121150024567) 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, 2588372149 + ... + 2588380308.

Almost surely, 2^{21121150024560} is an apocalyptic number.

21121150024560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121150024560 is an abundant number, since it is smaller than the sum of its proper divisors (48205918892976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121150024560 is a wasteful number, since it uses less digits than its factorization.

21121150024560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5176752490 (or 5176752484 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 21121150024560 its reverse (6542005112112), we get a palindrome (27663155136672).

The spelling of 21121150024560 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred fifty million, twenty-four thousand, five hundred sixty".