1021213164 has 24 divisors (see below), whose sum is σ = 2416393728. Its totient is φ = 335609680.

The previous prime is 1021213111. The next prime is 1021213247. The reversal of 1021213164 is 4613121201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021213164.

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, 598452 + ... + 600155.

It is an arithmetic number, because the mean of its divisors is an integer number (100683072).

Almost surely, 2^1021213164 is an apocalyptic number.

It is an amenable number.

1021213164 is an abundant number, since it is smaller than the sum of its proper divisors (1395180564).

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

1021213164 is a wasteful number, since it uses less digits than its factorization.

1021213164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198685 (or 1198683 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1021213164 is about 31956.4260204423. The cubic root of 1021213164 is about 1007.0216358992.

Adding to 1021213164 its reverse (4613121201), we get a palindrome (5634334365).

It can be divided in two parts, 1021 and 213164, that added together give a triangular number (214185 = T₆₅₄).

The spelling of 1021213164 in words is "one billion, twenty-one million, two hundred thirteen thousand, one hundred sixty-four".