1221014868 has 48 divisors (see below), whose sum is σ = 3032515584. Its totient is φ = 381045760.

The previous prime is 1221014849. The next prime is 1221014881. The reversal of 1221014868 is 8684101221.

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, 23296 + ... + 54632.

It is an arithmetic number, because the mean of its divisors is an integer number (63177408).

Almost surely, 2^1221014868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221014868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1516257792).

1221014868 is an abundant number, since it is smaller than the sum of its proper divisors (1811500716).

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

1221014868 is a wasteful number, since it uses less digits than its factorization.

1221014868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31552 (or 31550 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 1221014868 is about 34943.0231662917. The cubic root of 1221014868 is about 1068.8259367268.

The spelling of 1221014868 in words is "one billion, two hundred twenty-one million, fourteen thousand, eight hundred sixty-eight".