51121022042 has 8 divisors (see below), whose sum is σ = 77066868000. Its totient is φ = 25432066044.

The previous prime is 51121022041. The next prime is 51121022101. The reversal of 51121022042 is 24022012115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51121022042² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51121022041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64221992 + ... + 64222787.

It is an arithmetic number, because the mean of its divisors is an integer number (9633358500).

Almost surely, 2^51121022042 is an apocalyptic number.

51121022042 is a deficient number, since it is larger than the sum of its proper divisors (25945845958).

51121022042 is a wasteful number, since it uses less digits than its factorization.

51121022042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128444980.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 51121022042 its reverse (24022012115), we get a palindrome (75143034157).

The spelling of 51121022042 in words is "fifty-one billion, one hundred twenty-one million, twenty-two thousand, forty-two".