1021210312 has 8 divisors (see below), whose sum is σ = 1914769350. Its totient is φ = 510605152.

The previous prime is 1021210303. The next prime is 1021210331. The reversal of 1021210312 is 2130121201.

It can be written as a sum of positive squares in only one way, i.e., 856498756 + 164711556 = 29266^2 + 12834^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1021210292 and 1021210301.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63825637 + ... + 63825652.

Almost surely, 2^1021210312 is an apocalyptic number.

It is an amenable number.

1021210312 is a deficient number, since it is larger than the sum of its proper divisors (893559038).

1021210312 is a wasteful number, since it uses less digits than its factorization.

1021210312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127651295 (or 127651291 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1021210312 is about 31956.3813971482. The cubic root of 1021210312 is about 1007.0206984428.

Adding to 1021210312 its reverse (2130121201), we get a palindrome (3151331513).

The spelling of 1021210312 in words is "one billion, twenty-one million, two hundred ten thousand, three hundred twelve".