1212651116 has 24 divisors (see below), whose sum is σ = 2157711696. Its totient is φ = 596245760.

The previous prime is 1212651109. The next prime is 1212651133. The reversal of 1212651116 is 6111562121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48296 + ... + 68976.

It is an arithmetic number, because the mean of its divisors is an integer number (89904654).

Almost surely, 2^1212651116 is an apocalyptic number.

It is an amenable number.

1212651116 is a deficient number, since it is larger than the sum of its proper divisors (945060580).

1212651116 is a wasteful number, since it uses less digits than its factorization.

1212651116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20929 (or 20927 counting only the distinct ones).

The product of its digits is 720, while the sum is 26.

The square root of 1212651116 is about 34823.1405246569. The cubic root of 1212651116 is about 1066.3799156716.

The spelling of 1212651116 in words is "one billion, two hundred twelve million, six hundred fifty-one thousand, one hundred sixteen".