1011209972 has 24 divisors (see below), whose sum is σ = 1783761672. Its totient is φ = 501580800.

The previous prime is 1011209971. The next prime is 1011210023. The reversal of 1011209972 is 2799021101.

It can be written as a sum of positive squares in 4 ways, for example, as 359633296 + 651576676 = 18964^2 + 25526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011209971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269018 + ... + 272750.

It is an arithmetic number, because the mean of its divisors is an integer number (74323403).

Almost surely, 2^1011209972 is an apocalyptic number.

It is an amenable number.

1011209972 is a deficient number, since it is larger than the sum of its proper divisors (772551700).

1011209972 is a wasteful number, since it uses less digits than its factorization.

1011209972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259 (or 4257 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 1011209972 is about 31799.5278581302. The cubic root of 1011209972 is about 1003.7227810366.

The spelling of 1011209972 in words is "one billion, eleven million, two hundred nine thousand, nine hundred seventy-two".