1213136016 has 80 divisors (see below), whose sum is σ = 3304996800. Its totient is φ = 382385664.

The previous prime is 1213136009. The next prime is 1213136063. The reversal of 1213136016 is 6106313121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726030 + ... + 727698.

It is an arithmetic number, because the mean of its divisors is an integer number (41312460).

Almost surely, 2^1213136016 is an apocalyptic number.

1213136016 is a gapful number since it is divisible by the number (16) 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 1213136016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1652498400).

1213136016 is an abundant number, since it is smaller than the sum of its proper divisors (2091860784).

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

1213136016 is a wasteful number, since it uses less digits than its factorization.

1213136016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496 (or 2490 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1213136016 is about 34830.1021531663. The cubic root of 1213136016 is about 1066.5220336882.

Adding to 1213136016 its reverse (6106313121), we get a palindrome (7319449137).

The spelling of 1213136016 in words is "one billion, two hundred thirteen million, one hundred thirty-six thousand, sixteen".