1216902012 has 24 divisors (see below), whose sum is σ = 2865977856. Its totient is φ = 401842608.

The previous prime is 1216901999. The next prime is 1216902013. The reversal of 1216902012 is 2102096121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216902013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472588 + ... + 475155.

It is an arithmetic number, because the mean of its divisors is an integer number (119415744).

Almost surely, 2^1216902012 is an apocalyptic number.

1216902012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1216902012 is an abundant number, since it is smaller than the sum of its proper divisors (1649075844).

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

1216902012 is a wasteful number, since it uses less digits than its factorization.

1216902012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947857 (or 947855 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1216902012 is about 34884.1226348034. The cubic root of 1216902012 is about 1067.6245120557.

Adding to 1216902012 its reverse (2102096121), we get a palindrome (3318998133).

The spelling of 1216902012 in words is "one billion, two hundred sixteen million, nine hundred two thousand, twelve".