121137451 has 2 divisors, whose sum is σ = 121137452. Its totient is φ = 121137450.

The previous prime is 121137449. The next prime is 121137463. The reversal of 121137451 is 154731121.

It is a weak prime.

It is an emirp because it is prime and its reverse (154731121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121137451 - 2¹ = 121137449 is a prime.

Together with 121137449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121135451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60568725 + 60568726.

It is an arithmetic number, because the mean of its divisors is an integer number (60568726).

Almost surely, 2^121137451 is an apocalyptic number.

121137451 is a deficient number, since it is larger than the sum of its proper divisors (1).

121137451 is an equidigital number, since it uses as much as digits as its factorization.

121137451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 121137451 is about 11006.2459994314. The cubic root of 121137451 is about 494.7959584853.

Adding to 121137451 its reverse (154731121), we get a palindrome (275868572).

The spelling of 121137451 in words is "one hundred twenty-one million, one hundred thirty-seven thousand, four hundred fifty-one".