1213021096 has 64 divisors (see below), whose sum is σ = 2640960000. Its totient is φ = 511593408.

The previous prime is 1213021091. The next prime is 1213021157. The reversal of 1213021096 is 6901203121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213021096.

It is not an unprimeable number, because it can be changed into a prime (1213021091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2319091 + ... + 2319613.

It is an arithmetic number, because the mean of its divisors is an integer number (41265000).

Almost surely, 2^1213021096 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 1213021096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320480000).

1213021096 is an abundant number, since it is smaller than the sum of its proper divisors (1427938904).

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

1213021096 is a wasteful number, since it uses less digits than its factorization.

1213021096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1213021096 is about 34828.4523916869. The cubic root of 1213021096 is about 1066.4883555238.

The spelling of 1213021096 in words is "one billion, two hundred thirteen million, twenty-one thousand, ninety-six".