1213501104 has 60 divisors (see below), whose sum is σ = 3399224400. Its totient is φ = 404130432.

The previous prime is 1213501103. The next prime is 1213501109. The reversal of 1213501104 is 4011053121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213501103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186742 + ... + 193130.

It is an arithmetic number, because the mean of its divisors is an integer number (56653740).

Almost surely, 2^1213501104 is an apocalyptic number.

It is an amenable number.

1213501104 is an abundant number, since it is smaller than the sum of its proper divisors (2185723296).

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

1213501104 is a wasteful number, since it uses less digits than its factorization.

1213501104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7722 (or 7713 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1213501104 is about 34835.3427426802. The cubic root of 1213501104 is about 1066.6290113443.

Adding to 1213501104 its reverse (4011053121), we get a palindrome (5224554225).

The spelling of 1213501104 in words is "one billion, two hundred thirteen million, five hundred one thousand, one hundred four".