1611216120 has 32 divisors (see below), whose sum is σ = 4833648720. Its totient is φ = 429657600.

The previous prime is 1611215939. The next prime is 1611216121. The reversal of 1611216120 is 216121161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611216121) 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, 6713281 + ... + 6713520.

Almost surely, 2^1611216120 is an apocalyptic number.

1611216120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1611216120 is an abundant number, since it is smaller than the sum of its proper divisors (3222432600).

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

1611216120 is a wasteful number, since it uses less digits than its factorization.

1611216120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13426815 (or 13426811 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1611216120 is about 40139.9566516956. The cubic root of 1611216120 is about 1172.3337449889. Note that the first 3 decimals are identical.

Adding to 1611216120 its reverse (216121161), we get a palindrome (1827337281).

The spelling of 1611216120 in words is "one billion, six hundred eleven million, two hundred sixteen thousand, one hundred twenty".