1012121045 has 16 divisors (see below), whose sum is σ = 1309566720. Its totient is φ = 746501184.

The previous prime is 1012121029. The next prime is 1012121053. The reversal of 1012121045 is 5401212101.

It is not a de Polignac number, because 1012121045 - 2⁴ = 1012121029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46772 + ... + 64898.

It is an arithmetic number, because the mean of its divisors is an integer number (81847920).

Almost surely, 2^1012121045 is an apocalyptic number.

It is an amenable number.

1012121045 is a deficient number, since it is larger than the sum of its proper divisors (297445675).

1012121045 is a wasteful number, since it uses less digits than its factorization.

1012121045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19004.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1012121045 is about 31813.8498927747. The cubic root of 1012121045 is about 1004.0241329654.

Adding to 1012121045 its reverse (5401212101), we get a palindrome (6413333146).

The spelling of 1012121045 in words is "one billion, twelve million, one hundred twenty-one thousand, forty-five".