1121212203615 has 24 divisors (see below), whose sum is σ = 2221067984928. Its totient is φ = 512554150080.

The previous prime is 1121212203613. The next prime is 1121212203619. The reversal of 1121212203615 is 5163022121211.

It is a happy number.

1121212203615 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 21 + 2 + 20 + 3 + 615 = 666.

It is not a de Polignac number, because 1121212203615 - 2¹ = 1121212203613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121212203611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1779701596 + ... + 1779702225.

It is an arithmetic number, because the mean of its divisors is an integer number (92544499372).

Almost surely, 2^{1121212203615} is an apocalyptic number.

1121212203615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121212203615 is a deficient number, since it is larger than the sum of its proper divisors (1099855781313).

1121212203615 is a wasteful number, since it uses less digits than its factorization.

1121212203615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559403839 (or 3559403836 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 1121212203615 its reverse (5163022121211), we get a palindrome (6284234324826).

The spelling of 1121212203615 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred three thousand, six hundred fifteen".