1121610521 has 8 divisors (see below), whose sum is σ = 1126379520. Its totient is φ = 1116851872.

The previous prime is 1121610481. The next prime is 1121610557. The reversal of 1121610521 is 1250161211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121610521 - 2²² = 1117416217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121610493 and 1121610502.

It is not an unprimeable number, because it can be changed into a prime (1121610421) 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, 273341 + ... + 277413.

It is an arithmetic number, because the mean of its divisors is an integer number (140797440).

Almost surely, 2^1121610521 is an apocalyptic number.

It is an amenable number.

1121610521 is a deficient number, since it is larger than the sum of its proper divisors (4768999).

1121610521 is an equidigital number, since it uses as much as digits as its factorization.

1121610521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5175.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1121610521 is about 33490.4541772727. The cubic root of 1121610521 is about 1038.9963570135.

Adding to 1121610521 its reverse (1250161211), we get a palindrome (2371771732).

The spelling of 1121610521 in words is "one billion, one hundred twenty-one million, six hundred ten thousand, five hundred twenty-one".