121002045 has 16 divisors (see below), whose sum is σ = 193741632. Its totient is φ = 64488320.

The previous prime is 121002041. The next prime is 121002047. The reversal of 121002045 is 540200121.

It is not a de Polignac number, because 121002045 - 2² = 121002041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002041) 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, 34210 + ... + 37580.

It is an arithmetic number, because the mean of its divisors is an integer number (12108852).

Almost surely, 2^121002045 is an apocalyptic number.

121002045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121002045 is a deficient number, since it is larger than the sum of its proper divisors (72739587).

121002045 is a wasteful number, since it uses less digits than its factorization.

121002045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5772.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 121002045 is about 11000.0929541527. The cubic root of 121002045 is about 494.6115307414.

Adding to 121002045 its reverse (540200121), we get a palindrome (661202166).

The spelling of 121002045 in words is "one hundred twenty-one million, two thousand, forty-five".