121217607 has 32 divisors (see below), whose sum is σ = 210255360. Its totient is φ = 67573440.

The previous prime is 121217597. The next prime is 121217623. The reversal of 121217607 is 706712121.

It is not a de Polignac number, because 121217607 - 2⁶ = 121217543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121218607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73 + ... + 15570.

It is an arithmetic number, because the mean of its divisors is an integer number (6570480).

Almost surely, 2^121217607 is an apocalyptic number.

121217607 is a deficient number, since it is larger than the sum of its proper divisors (89037753).

121217607 is a wasteful number, since it uses less digits than its factorization.

121217607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15700 (or 15694 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 121217607 is about 11009.8867841590. The cubic root of 121217607 is about 494.9050690313.

Adding to 121217607 its reverse (706712121), we get a palindrome (827929728).

The spelling of 121217607 in words is "one hundred twenty-one million, two hundred seventeen thousand, six hundred seven".