1221223202134 has 32 divisors (see below), whose sum is σ = 2030466291840. Its totient is φ = 547383657600.

The previous prime is 1221223202117. The next prime is 1221223202141. The reversal of 1221223202134 is 4312023221221.

It is a super-2 number, since 2×1221223202134² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221223202099 and 1221223202108.

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, 4748137 + ... + 4998724.

It is an arithmetic number, because the mean of its divisors is an integer number (63452071620).

Almost surely, 2^{1221223202134} is an apocalyptic number.

1221223202134 is a deficient number, since it is larger than the sum of its proper divisors (809243089706).

1221223202134 is a wasteful number, since it uses less digits than its factorization.

1221223202134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9747016.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1221223202134 its reverse (4312023221221), we get a palindrome (5533246423355).

The spelling of 1221223202134 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-three million, two hundred two thousand, one hundred thirty-four".