121445507 has 16 divisors (see below), whose sum is σ = 130029312. Its totient is φ = 113218560.

The previous prime is 121445491. The next prime is 121445537. The reversal of 121445507 is 705544121.

It is a cyclic number.

It is not a de Polignac number, because 121445507 - 2⁴ = 121445491 is a prime.

It is a super-2 number, since 2×121445507² = 29498022340974098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121445507.

It is not an unprimeable number, because it can be changed into a prime (121445537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129143 + ... + 130079.

It is an arithmetic number, because the mean of its divisors is an integer number (8126832).

Almost surely, 2^121445507 is an apocalyptic number.

121445507 is a deficient number, since it is larger than the sum of its proper divisors (8583805).

121445507 is a wasteful number, since it uses less digits than its factorization.

121445507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 121445507 is about 11020.2317126275. The cubic root of 121445507 is about 495.2150302032.

Adding to 121445507 its reverse (705544121), we get a palindrome (826989628).

The spelling of 121445507 in words is "one hundred twenty-one million, four hundred forty-five thousand, five hundred seven".