1021015312 has 40 divisors (see below), whose sum is σ = 2091810560. Its totient is φ = 481438080.

The previous prime is 1021015309. The next prime is 1021015313. The reversal of 1021015312 is 2135101201.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1021015313) 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, 60262 + ... + 75322.

It is an arithmetic number, because the mean of its divisors is an integer number (52295264).

Almost surely, 2^1021015312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021015312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1045905280).

1021015312 is an abundant number, since it is smaller than the sum of its proper divisors (1070795248).

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

1021015312 is a wasteful number, since it uses less digits than its factorization.

1021015312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15311 (or 15305 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1021015312 is about 31953.3302176784. The cubic root of 1021015312 is about 1006.9565975310.

Adding to 1021015312 its reverse (2135101201), we get a palindrome (3156116513).

The spelling of 1021015312 in words is "one billion, twenty-one million, fifteen thousand, three hundred twelve".