13121054551 has 32 divisors (see below), whose sum is σ = 14821678080. Its totient is φ = 11514048000.

The previous prime is 13121054549. The next prime is 13121054593. The reversal of 13121054551 is 15545012131.

It is a cyclic number.

It is not a de Polignac number, because 13121054551 - 2¹ = 13121054549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121054951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9947070 + ... + 9948388.

It is an arithmetic number, because the mean of its divisors is an integer number (463177440).

Almost surely, 2^13121054551 is an apocalyptic number.

13121054551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13121054551 is a deficient number, since it is larger than the sum of its proper divisors (1700623529).

13121054551 is a wasteful number, since it uses less digits than its factorization.

13121054551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 13121054551 its reverse (15545012131), we get a palindrome (28666066682).

It can be divided in two parts, 131210 and 54551, that added together give a square (185761 = 431²).

The spelling of 13121054551 in words is "thirteen billion, one hundred twenty-one million, fifty-four thousand, five hundred fifty-one".