51020340421002 has 32 divisors (see below), whose sum is σ = 103026118320000. Its totient is φ = 16842781562880.

The previous prime is 51020340420961. The next prime is 51020340421009. The reversal of 51020340421002 is 20012404302015.

It is not an unprimeable number, because it can be changed into a prime (51020340421009) 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, 29277774 + ... + 30971417.

It is an arithmetic number, because the mean of its divisors is an integer number (3219566197500).

Almost surely, 2^{51020340421002} is an apocalyptic number.

51020340421002 is an abundant number, since it is smaller than the sum of its proper divisors (52005777898998).

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

51020340421002 is a wasteful number, since it uses less digits than its factorization.

51020340421002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60250558.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 51020340421002 its reverse (20012404302015), we get a palindrome (71032744723017).

The spelling of 51020340421002 in words is "fifty-one trillion, twenty billion, three hundred forty million, four hundred twenty-one thousand, two".