1021213134 has 48 divisors (see below), whose sum is σ = 2299190400. Its totient is φ = 327192768.

The previous prime is 1021213111. The next prime is 1021213247. The reversal of 1021213134 is 4313121201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115267 + ... + 123809.

It is an arithmetic number, because the mean of its divisors is an integer number (47899800).

Almost surely, 2^1021213134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021213134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1149595200).

1021213134 is an abundant number, since it is smaller than the sum of its proper divisors (1277977266).

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

1021213134 is a wasteful number, since it uses less digits than its factorization.

1021213134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8809 (or 8806 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1021213134 is about 31956.4255510531. The cubic root of 1021213134 is about 1007.0216260382.

Adding to 1021213134 its reverse (4313121201), we get a palindrome (5334334335).

The spelling of 1021213134 in words is "one billion, twenty-one million, two hundred thirteen thousand, one hundred thirty-four".