1021604212 has 6 divisors (see below), whose sum is σ = 1787807378. Its totient is φ = 510802104.

The previous prime is 1021604209. The next prime is 1021604237. The reversal of 1021604212 is 2124061201.

It can be written as a sum of positive squares in only one way, i.e., 806219236 + 215384976 = 28394^2 + 14676^2 .

It is a super-2 number, since 2×1021604212² = 2087350331952281888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1021604212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127700523 + ... + 127700530.

Almost surely, 2^1021604212 is an apocalyptic number.

It is an amenable number.

1021604212 is a deficient number, since it is larger than the sum of its proper divisors (766203166).

1021604212 is a wasteful number, since it uses less digits than its factorization.

1021604212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255401057 (or 255401055 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1021604212 is about 31962.5438912487. The cubic root of 1021604212 is about 1007.1501573992.

Adding to 1021604212 its reverse (2124061201), we get a palindrome (3145665413).

The spelling of 1021604212 in words is "one billion, twenty-one million, six hundred four thousand, two hundred twelve".