1011521204 has 6 divisors (see below), whose sum is σ = 1770162114. Its totient is φ = 505760600.

The previous prime is 1011521201. The next prime is 1011521237. The reversal of 1011521204 is 4021251101.

1011521204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1001849104 + 9672100 = 31652^2 + 3110^2 .

It is a super-2 number, since 2×1011521204² = 2046350292283219232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011521201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126440147 + ... + 126440154.

It is an arithmetic number, because the mean of its divisors is an integer number (295027019).

Almost surely, 2^1011521204 is an apocalyptic number.

It is an amenable number.

1011521204 is a deficient number, since it is larger than the sum of its proper divisors (758640910).

1011521204 is a wasteful number, since it uses less digits than its factorization.

1011521204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252880305 (or 252880303 counting only the distinct ones).

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

The square root of 1011521204 is about 31804.4211392064. The cubic root of 1011521204 is about 1003.8257463334.

Adding to 1011521204 its reverse (4021251101), we get a palindrome (5032772305).

The spelling of 1011521204 in words is "one billion, eleven million, five hundred twenty-one thousand, two hundred four".