1201113112521 has 32 divisors (see below), whose sum is σ = 1877316652800. Its totient is φ = 668880785664.

The previous prime is 1201113112499. The next prime is 1201113112523. The reversal of 1201113112521 is 1252113111021.

It is not a de Polignac number, because 1201113112521 - 2²³ = 1201104723913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1201113112523) 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, 3455530 + ... + 3787203.

It is an arithmetic number, because the mean of its divisors is an integer number (58666145400).

Almost surely, 2^{1201113112521} is an apocalyptic number.

It is an amenable number.

1201113112521 is a deficient number, since it is larger than the sum of its proper divisors (676203540279).

1201113112521 is a wasteful number, since it uses less digits than its factorization.

1201113112521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242945.

The product of its (nonzero) digits is 120, while the sum is 21.

Adding to 1201113112521 its reverse (1252113111021), we get a palindrome (2453226223542).

The spelling of 1201113112521 in words is "one trillion, two hundred one billion, one hundred thirteen million, one hundred twelve thousand, five hundred twenty-one".