1021615012 has 24 divisors (see below), whose sum is σ = 2035156032. Its totient is φ = 444180000.

The previous prime is 1021615003. The next prime is 1021615039. The reversal of 1021615012 is 2105161201.

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, 503739 + ... + 505762.

It is an arithmetic number, because the mean of its divisors is an integer number (84798168).

Almost surely, 2^1021615012 is an apocalyptic number.

It is an amenable number.

1021615012 is a deficient number, since it is larger than the sum of its proper divisors (1013541020).

1021615012 is a wasteful number, since it uses less digits than its factorization.

1021615012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009539 (or 1009537 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1021615012 is about 31962.7128385561. The cubic root of 1021615012 is about 1007.1537064525.

Adding to 1021615012 its reverse (2105161201), we get a palindrome (3126776213).

The spelling of 1021615012 in words is "one billion, twenty-one million, six hundred fifteen thousand, twelve".