1021211300 has 144 divisors (see below), whose sum is σ = 2405179392. Its totient is φ = 375580800.

The previous prime is 1021211291. The next prime is 1021211311. The reversal of 1021211300 is 31121201.

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 47 ways as a sum of consecutive naturals, for example, 6265019 + ... + 6265181.

Almost surely, 2^1021211300 is an apocalyptic number.

1021211300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021211300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202589696).

1021211300 is an abundant number, since it is smaller than the sum of its proper divisors (1383968092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021211300 is a wasteful number, since it uses less digits than its factorization.

1021211300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1021211300 is about 31956.3968557158. The cubic root of 1021211300 is about 1007.0210232000.

Adding to 1021211300 its reverse (31121201), we get a palindrome (1052332501).

Subtracting from 1021211300 its reverse (31121201), we obtain a palindrome (990090099).

It can be divided in two parts, 10212 and 11300, that added together give a palindrome (21512).

The spelling of 1021211300 in words is "one billion, twenty-one million, two hundred eleven thousand, three hundred".