1553340525121 has 12 divisors (see below), whose sum is σ = 1951303801216. Its totient is φ = 1210395213720.

The previous prime is 1553340525109. The next prime is 1553340525167. The reversal of 1553340525121 is 1215250433551.

It is not a de Polignac number, because 1553340525121 - 2²¹ = 1553338427969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1553340525721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 916965225 + ... + 916966918.

Almost surely, 2^{1553340525121} is an apocalyptic number.

1553340525121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1553340525121 is a deficient number, since it is larger than the sum of its proper divisors (397963276095).

1553340525121 is a wasteful number, since it uses less digits than its factorization.

1553340525121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833932172 (or 1833932161 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

Adding to 1553340525121 its reverse (1215250433551), we get a palindrome (2768590958672).

The spelling of 1553340525121 in words is "one trillion, five hundred fifty-three billion, three hundred forty million, five hundred twenty-five thousand, one hundred twenty-one".