1221223234 has 48 divisors (see below), whose sum is σ = 2380593600. Its totient is φ = 459375840.

The previous prime is 1221223229. The next prime is 1221223301. The reversal of 1221223234 is 4323221221.

It is a super-2 number, since 2×1221223234² = 2982772374522837512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36697 + ... + 61555.

It is an arithmetic number, because the mean of its divisors is an integer number (49595700).

Almost surely, 2^1221223234 is an apocalyptic number.

1221223234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221223234 is a deficient number, since it is larger than the sum of its proper divisors (1159370366).

1221223234 is a wasteful number, since it uses less digits than its factorization.

1221223234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24919 (or 24908 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 1221223234 is about 34946.0045498767. The cubic root of 1221223234 is about 1068.8867315961.

Adding to 1221223234 its reverse (4323221221), we get a palindrome (5544444455).

The spelling of 1221223234 in words is "one billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-four".