121116653 has 8 divisors (see below), whose sum is σ = 146561472. Its totient is φ = 97707456.

The previous prime is 121116623. The next prime is 121116679. The reversal of 121116653 is 356611121.

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

It is not a de Polignac number, because 121116653 - 2⁸ = 121116397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121116623) 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, 508775 + ... + 509012.

It is an arithmetic number, because the mean of its divisors is an integer number (18320184).

Almost surely, 2^121116653 is an apocalyptic number.

It is an amenable number.

121116653 is a deficient number, since it is larger than the sum of its proper divisors (25444819).

121116653 is a wasteful number, since it uses less digits than its factorization.

121116653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017811.

The product of its digits is 1080, while the sum is 26.

The square root of 121116653 is about 11005.3011317274. The cubic root of 121116653 is about 494.7676398130.

Adding to 121116653 its reverse (356611121), we get a palindrome (477727774).

The spelling of 121116653 in words is "one hundred twenty-one million, one hundred sixteen thousand, six hundred fifty-three".