1021213210 has 16 divisors (see below), whose sum is σ = 1838749896. Its totient is φ = 408359488.

The previous prime is 1021213111. The next prime is 1021213247. The reversal of 1021213210 is 123121201.

It can be written as a sum of positive squares in 4 ways, for example, as 965904241 + 55308969 = 31079^2 + 7437^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22884 + ... + 50656.

Almost surely, 2^1021213210 is an apocalyptic number.

1021213210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021213210 is a deficient number, since it is larger than the sum of its proper divisors (817536686).

1021213210 is a wasteful number, since it uses less digits than its factorization.

1021213210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31457.

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

The square root of 1021213210 is about 31956.4267401723. The cubic root of 1021213210 is about 1007.0216510194.

Adding to 1021213210 its reverse (123121201), we get a palindrome (1144334411).

The spelling of 1021213210 in words is "one billion, twenty-one million, two hundred thirteen thousand, two hundred ten".