5551211128321 has 16 divisors (see below), whose sum is σ = 5626580863680. Its totient is φ = 5476046683840.

The previous prime is 5551211128301. The next prime is 5551211128349. The reversal of 5551211128321 is 1238211121555.

It is a cyclic number.

It is not a de Polignac number, because 5551211128321 - 2¹¹ = 5551211126273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5551211128301) 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, 524237895 + ... + 524248483.

It is an arithmetic number, because the mean of its divisors is an integer number (351661303980).

Almost surely, 2^{5551211128321} is an apocalyptic number.

It is an amenable number.

5551211128321 is a deficient number, since it is larger than the sum of its proper divisors (75369735359).

5551211128321 is a wasteful number, since it uses less digits than its factorization.

5551211128321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19616.

The product of its digits is 24000, while the sum is 37.

Adding to 5551211128321 its reverse (1238211121555), we get a palindrome (6789422249876).

The spelling of 5551211128321 in words is "five trillion, five hundred fifty-one billion, two hundred eleven million, one hundred twenty-eight thousand, three hundred twenty-one".