121445651 has 2 divisors, whose sum is σ = 121445652. Its totient is φ = 121445650.

The previous prime is 121445629. The next prime is 121445719. The reversal of 121445651 is 156544121.

It is a weak prime.

It is an emirp because it is prime and its reverse (156544121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121445651 - 2¹⁰ = 121444627 is a prime.

It is a super-2 number, since 2×121445651² = 29498092293627602, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121445251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60722825 + 60722826.

It is an arithmetic number, because the mean of its divisors is an integer number (60722826).

Almost surely, 2^121445651 is an apocalyptic number.

121445651 is a deficient number, since it is larger than the sum of its proper divisors (1).

121445651 is an equidigital number, since it uses as much as digits as its factorization.

121445651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 29.

The square root of 121445651 is about 11020.2382460635. The cubic root of 121445651 is about 495.2152259315.

Adding to 121445651 its reverse (156544121), we get a palindrome (277989772).

The spelling of 121445651 in words is "one hundred twenty-one million, four hundred forty-five thousand, six hundred fifty-one".