121600651 has 2 divisors, whose sum is σ = 121600652. Its totient is φ = 121600650.

The previous prime is 121600649. The next prime is 121600663. The reversal of 121600651 is 156006121.

It is a weak prime.

It is an emirp because it is prime and its reverse (156006121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121600651 - 2¹ = 121600649 is a prime.

Together with 121600649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121600601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60800325 + 60800326.

It is an arithmetic number, because the mean of its divisors is an integer number (60800326).

Almost surely, 2^121600651 is an apocalyptic number.

121600651 is a deficient number, since it is larger than the sum of its proper divisors (1).

121600651 is an equidigital number, since it uses as much as digits as its factorization.

121600651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 121600651 is about 11027.2685194476. The cubic root of 121600651 is about 495.4258159558.

Adding to 121600651 its reverse (156006121), we get a palindrome (277606772).

The spelling of 121600651 in words is "one hundred twenty-one million, six hundred thousand, six hundred fifty-one".