54221121642 has 32 divisors (see below), whose sum is σ = 110766673152. Its totient is φ = 17686421504.

The previous prime is 54221121641. The next prime is 54221121649. The reversal of 54221121642 is 24612112245.

It is not an unprimeable number, because it can be changed into a prime (54221121641) 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 15 ways as a sum of consecutive naturals, for example, 2661238 + ... + 2681534.

It is an arithmetic number, because the mean of its divisors is an integer number (3461458536).

Almost surely, 2^54221121642 is an apocalyptic number.

54221121642 is an abundant number, since it is smaller than the sum of its proper divisors (56545551510).

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

54221121642 is a wasteful number, since it uses less digits than its factorization.

54221121642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29822.

The product of its digits is 7680, while the sum is 30.

Adding to 54221121642 its reverse (24612112245), we get a palindrome (78833233887).

The spelling of 54221121642 in words is "fifty-four billion, two hundred twenty-one million, one hundred twenty-one thousand, six hundred forty-two".