51921048021120 has 512 divisors, whose sum is σ = 195180430464000. Its totient is φ = 12999273873408.

The previous prime is 51921048021097. The next prime is 51921048021127. The reversal of 51921048021120 is 2112084012915.

51921048021120 is a `hidden beast` number, since 5 + 19 + 21 + 0 + 480 + 21 + 120 = 666.

It is a super-2 number, since 2×51921048021120² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51921048021127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119931769 + ... + 120363911.

It is an arithmetic number, because the mean of its divisors is an integer number (381211778250).

Almost surely, 2^{51921048021120} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51921048021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97590215232000).

51921048021120 is an abundant number, since it is smaller than the sum of its proper divisors (143259382442880).

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

51921048021120 is a wasteful number, since it uses less digits than its factorization.

51921048021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432597 (or 432579 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 51921048021120 in words is "fifty-one trillion, nine hundred twenty-one billion, forty-eight million, twenty-one thousand, one hundred twenty".