1021215104 has 128 divisors (see below), whose sum is σ = 2540354880. Its totient is φ = 398131200.

The previous prime is 1021215073. The next prime is 1021215131. The reversal of 1021215104 is 4015121201.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849704 + ... + 850904.

Almost surely, 2^1021215104 is an apocalyptic number.

1021215104 is a gapful number since it is divisible by the number (14) 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 1021215104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270177440).

1021215104 is an abundant number, since it is smaller than the sum of its proper divisors (1519139776).

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

1021215104 is a wasteful number, since it uses less digits than its factorization.

1021215104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1021215104 is about 31956.4563742603. The cubic root of 1021215104 is about 1007.0222735789.

Adding to 1021215104 its reverse (4015121201), we get a palindrome (5036336305).

The spelling of 1021215104 in words is "one billion, twenty-one million, two hundred fifteen thousand, one hundred four".