551021535122 has 4 divisors (see below), whose sum is σ = 826532302686. Its totient is φ = 275510767560.

The previous prime is 551021535121. The next prime is 551021535149. The reversal of 551021535122 is 221535120155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 544571678401 + 6449856721 = 737951^2 + 80311^2 .

It is not an unprimeable number, because it can be changed into a prime (551021535121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137755383779 + ... + 137755383782.

Almost surely, 2^551021535122 is an apocalyptic number.

551021535122 is a deficient number, since it is larger than the sum of its proper divisors (275510767564).

551021535122 is a wasteful number, since it uses less digits than its factorization.

551021535122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275510767563.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 551021535122 its reverse (221535120155), we get a palindrome (772556655277).

The spelling of 551021535122 in words is "five hundred fifty-one billion, twenty-one million, five hundred thirty-five thousand, one hundred twenty-two".