1021255210 has 16 divisors (see below), whose sum is σ = 1839721896. Its totient is φ = 408177088.

The previous prime is 1021255189. The next prime is 1021255211. The reversal of 1021255210 is 125521201.

It can be written as a sum of positive squares in 4 ways, for example, as 850247281 + 171007929 = 29159^2 + 13077^2 .

It is not an unprimeable number, because it can be changed into a prime (1021255211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27217 + ... + 52756.

Almost surely, 2^1021255210 is an apocalyptic number.

1021255210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021255210 is a deficient number, since it is larger than the sum of its proper divisors (818466686).

1021255210 is a wasteful number, since it uses less digits than its factorization.

1021255210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81257.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1021255210 is about 31957.0838782264. The cubic root of 1021255210 is about 1007.0354562755.

Adding to 1021255210 its reverse (125521201), we get a palindrome (1146776411).

The spelling of 1021255210 in words is "one billion, twenty-one million, two hundred fifty-five thousand, two hundred ten".