1214121280 has 112 divisors (see below), whose sum is σ = 3057022080. Its totient is φ = 458016768.

The previous prime is 1214121277. The next prime is 1214121287. The reversal of 1214121280 is 821214121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214121287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2413509 + ... + 2414011.

It is an arithmetic number, because the mean of its divisors is an integer number (27294840).

Almost surely, 2^1214121280 is an apocalyptic number.

1214121280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1214121280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1528511040).

1214121280 is an abundant number, since it is smaller than the sum of its proper divisors (1842900800).

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

1214121280 is a wasteful number, since it uses less digits than its factorization.

1214121280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1214121280 is about 34844.2431400081. The cubic root of 1214121280 is about 1066.8106854152.

The spelling of 1214121280 in words is "one billion, two hundred fourteen million, one hundred twenty-one thousand, two hundred eighty".