1253003521121 has 8 divisors (see below), whose sum is σ = 1378209734688. Its totient is φ = 1139094108900.

The previous prime is 1253003521093. The next prime is 1253003521127. The reversal of 1253003521121 is 1211253003521.

It is not a de Polignac number, because 1253003521121 - 2¹⁴ = 1253003504737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253003521127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470698715 + ... + 470701376.

It is an arithmetic number, because the mean of its divisors is an integer number (172276216836).

Almost surely, 2^{1253003521121} is an apocalyptic number.

1253003521121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1253003521121 is a deficient number, since it is larger than the sum of its proper divisors (125206213567).

1253003521121 is an frugal number, since it uses more digits than its factorization.

1253003521121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941400124 (or 941400102 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 1253003521121 its reverse (1211253003521), we get a palindrome (2464256524642).

The spelling of 1253003521121 in words is "one trillion, two hundred fifty-three billion, three million, five hundred twenty-one thousand, one hundred twenty-one".