121643612 has 6 divisors (see below), whose sum is σ = 212876328. Its totient is φ = 60821804.

The previous prime is 121643611. The next prime is 121643629. The reversal of 121643612 is 216346121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121643611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15205448 + ... + 15205455.

It is an arithmetic number, because the mean of its divisors is an integer number (35479388).

Almost surely, 2^121643612 is an apocalyptic number.

It is an amenable number.

121643612 is a deficient number, since it is larger than the sum of its proper divisors (91232716).

121643612 is a wasteful number, since it uses less digits than its factorization.

121643612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30410907 (or 30410905 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 121643612 is about 11029.2162912874. The cubic root of 121643612 is about 495.4841530406.

Adding to 121643612 its reverse (216346121), we get a palindrome (337989733).

The spelling of 121643612 in words is "one hundred twenty-one million, six hundred forty-three thousand, six hundred twelve".