121322145 has 16 divisors (see below), whose sum is σ = 221846400. Its totient is φ = 55461504.

The previous prime is 121322137. The next prime is 121322161. The reversal of 121322145 is 541223121.

It is not a de Polignac number, because 121322145 - 2³ = 121322137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577620 + ... + 577829.

It is an arithmetic number, because the mean of its divisors is an integer number (13865400).

Almost surely, 2^121322145 is an apocalyptic number.

121322145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121322145 is a deficient number, since it is larger than the sum of its proper divisors (100524255).

121322145 is a wasteful number, since it uses less digits than its factorization.

121322145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155464.

The product of its digits is 480, while the sum is 21.

The square root of 121322145 is about 11014.6332213106. The cubic root of 121322145 is about 495.0472967765.

Adding to 121322145 its reverse (541223121), we get a palindrome (662545266).

The spelling of 121322145 in words is "one hundred twenty-one million, three hundred twenty-two thousand, one hundred forty-five".