51363124121420 has 144 divisors (see below), whose sum is σ = 117098641644768. Its totient is φ = 18914165867520.

The previous prime is 51363124121389. The next prime is 51363124121423. The reversal of 51363124121420 is 2412142136315.

It is not an unprimeable number, because it can be changed into a prime (51363124121423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35852312 + ... + 37257408.

It is an arithmetic number, because the mean of its divisors is an integer number (813185011422).

Almost surely, 2^{51363124121420} 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 51363124121420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58549320822384).

51363124121420 is an abundant number, since it is smaller than the sum of its proper divisors (65735517523348).

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

51363124121420 is a wasteful number, since it uses less digits than its factorization.

51363124121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405288 (or 1405267 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 51363124121420 its reverse (2412142136315), we get a palindrome (53775266257735).

The spelling of 51363124121420 in words is "fifty-one trillion, three hundred sixty-three billion, one hundred twenty-four million, one hundred twenty-one thousand, four hundred twenty".