1121531501636 has 24 divisors (see below), whose sum is σ = 2415606312000. Its totient is φ = 443682791712.

The previous prime is 1121531501621. The next prime is 1121531501639. The reversal of 1121531501636 is 6361051351211.

It is a junction number, because it is equal to n+sod(n) for n = 1121531501596 and 1121531501605.

It is not an unprimeable number, because it can be changed into a prime (1121531501639) 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, 1540564886 + ... + 1540565613.

It is an arithmetic number, because the mean of its divisors is an integer number (100650263000).

Almost surely, 2^{1121531501636} is an apocalyptic number.

It is an amenable number.

1121531501636 is an abundant number, since it is smaller than the sum of its proper divisors (1294074810364).

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

1121531501636 is a wasteful number, since it uses less digits than its factorization.

1121531501636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081130523 (or 3081130521 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

Adding to 1121531501636 its reverse (6361051351211), we get a palindrome (7482582852847).

The spelling of 1121531501636 in words is "one trillion, one hundred twenty-one billion, five hundred thirty-one million, five hundred one thousand, six hundred thirty-six".