121611648 has 32 divisors (see below), whose sum is σ = 323031960. Its totient is φ = 40537088.

The previous prime is 121611643. The next prime is 121611653. The reversal of 121611648 is 846116121.

It is an interprime number because it is at equal distance from previous prime (121611643) and next prime (121611653).

It is a tau number, because it is divible by the number of its divisors (32).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121611641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157965 + ... + 158732.

Almost surely, 2^121611648 is an apocalyptic number.

It is an amenable number.

121611648 is an abundant number, since it is smaller than the sum of its proper divisors (201420312).

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

121611648 is an equidigital number, since it uses as much as digits as its factorization.

121611648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316714 (or 316702 counting only the distinct ones).

The product of its digits is 2304, while the sum is 30.

The square root of 121611648 is about 11027.7671357351. The cubic root of 121611648 is about 495.4407501782.

Adding to 121611648 its reverse (846116121), we get a palindrome (967727769).

The spelling of 121611648 in words is "one hundred twenty-one million, six hundred eleven thousand, six hundred forty-eight".