1221243114 has 32 divisors (see below), whose sum is σ = 3006138240. Its totient is φ = 322085952.

The previous prime is 1221243091. The next prime is 1221243131. The reversal of 1221243114 is 4113421221.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 1117809 + ... + 1118900.

It is an arithmetic number, because the mean of its divisors is an integer number (93941820).

Almost surely, 2^1221243114 is an apocalyptic number.

1221243114 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221243114 is an abundant number, since it is smaller than the sum of its proper divisors (1784895126).

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

1221243114 is a wasteful number, since it uses less digits than its factorization.

1221243114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236734.

The product of its digits is 384, while the sum is 21.

The square root of 1221243114 is about 34946.2889875306. The cubic root of 1221243114 is about 1068.8925316148.

Adding to 1221243114 its reverse (4113421221), we get a palindrome (5334664335).

The spelling of 1221243114 in words is "one billion, two hundred twenty-one million, two hundred forty-three thousand, one hundred fourteen".