1021211210 has 32 divisors (see below), whose sum is σ = 1867484160. Its totient is φ = 402023232.

The previous prime is 1021211209. The next prime is 1021211251. The reversal of 1021211210 is 121121201.

It is a junction number, because it is equal to n+sod(n) for n = 1021211191 and 1021211200.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 164951 + ... + 171029.

It is an arithmetic number, because the mean of its divisors is an integer number (58358880).

Almost surely, 2^1021211210 is an apocalyptic number.

1021211210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021211210 is a deficient number, since it is larger than the sum of its proper divisors (846272950).

1021211210 is a wasteful number, since it uses less digits than its factorization.

1021211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6350.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1021211210 is about 31956.3954475470. The cubic root of 1021211210 is about 1007.0209936169.

Adding to 1021211210 its reverse (121121201), we get a palindrome (1142332411).

Subtracting from 1021211210 its reverse (121121201), we obtain a palindrome (900090009).

The spelling of 1021211210 in words is "one billion, twenty-one million, two hundred eleven thousand, two hundred ten".