1015221012 has 96 divisors (see below), whose sum is σ = 2690349312. Its totient is φ = 295612416.

The previous prime is 1015221007. The next prime is 1015221017. The reversal of 1015221012 is 2101225101.

It is an interprime number because it is at equal distance from previous prime (1015221007) and next prime (1015221017).

It is a junction number, because it is equal to n+sod(n) for n = 1015220982 and 1015221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1015221017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346578 + ... + 349494.

It is an arithmetic number, because the mean of its divisors is an integer number (28024472).

Almost surely, 2^1015221012 is an apocalyptic number.

1015221012 is a gapful number since it is divisible by the number (12) 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 1015221012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345174656).

1015221012 is an abundant number, since it is smaller than the sum of its proper divisors (1675128300).

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

1015221012 is a wasteful number, since it uses less digits than its factorization.

1015221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057 (or 3055 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1015221012 is about 31862.5330443140. The cubic root of 1015221012 is about 1005.0481440267.

Adding to 1015221012 its reverse (2101225101), we get a palindrome (3116446113).

The spelling of 1015221012 in words is "one billion, fifteen million, two hundred twenty-one thousand, twelve".