1216112510 has 32 divisors (see below), whose sum is σ = 2327463072. Its totient is φ = 455915520.

The previous prime is 1216112501. The next prime is 1216112533. The reversal of 1216112510 is 152116121.

It is a congruent number.

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, 26129 + ... + 55811.

It is an arithmetic number, because the mean of its divisors is an integer number (72733221).

Almost surely, 2^1216112510 is an apocalyptic number.

1216112510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216112510 is a deficient number, since it is larger than the sum of its proper divisors (1111350562).

1216112510 is a wasteful number, since it uses less digits than its factorization.

1216112510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29948.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1216112510 is about 34872.8047337750. The cubic root of 1216112510 is about 1067.3935775382.

Adding to 1216112510 its reverse (152116121), we get a palindrome (1368228631).

The spelling of 1216112510 in words is "one billion, two hundred sixteen million, one hundred twelve thousand, five hundred ten".