1021211230 has 48 divisors (see below), whose sum is σ = 1995768720. Its totient is φ = 376057344.

The previous prime is 1021211209. The next prime is 1021211251. The reversal of 1021211230 is 321121201.

It is an interprime number because it is at equal distance from previous prime (1021211209) and next prime (1021211251).

It is a super-2 number, since 2×1021211230² = 2085744752556225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 1021211230.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1001661 + ... + 1002679.

It is an arithmetic number, because the mean of its divisors is an integer number (41578515).

Almost surely, 2^1021211230 is an apocalyptic number.

1021211230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021211230 is a deficient number, since it is larger than the sum of its proper divisors (974557490).

1021211230 is a wasteful number, since it uses less digits than its factorization.

1021211230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645 (or 1632 counting only the distinct ones).

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

The square root of 1021211230 is about 31956.3957604734. The cubic root of 1021211230 is about 1007.0210001909.

Adding to 1021211230 its reverse (321121201), we get a palindrome (1342332431).

The spelling of 1021211230 in words is "one billion, twenty-one million, two hundred eleven thousand, two hundred thirty".