13121023554 has 48 divisors (see below), whose sum is σ = 28680012504. Its totient is φ = 4335206400.

The previous prime is 13121023549. The next prime is 13121023561. The reversal of 13121023554 is 45532012131.

13121023554 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 102 + 3 + 554 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8432197929 + 4688825625 = 91827^2 + 68475^2 .

It is a super-2 number, since 2×13121023554² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 969474 + ... + 982914.

Almost surely, 2^13121023554 is an apocalyptic number.

13121023554 is an abundant number, since it is smaller than the sum of its proper divisors (15558988950).

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

13121023554 is a wasteful number, since it uses less digits than its factorization.

13121023554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13923 (or 13920 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 13121023554 its reverse (45532012131), we get a palindrome (58653035685).

The spelling of 13121023554 in words is "thirteen billion, one hundred twenty-one million, twenty-three thousand, five hundred fifty-four".