1221102134 has 8 divisors (see below), whose sum is σ = 2093317968. Its totient is φ = 523329480.

The previous prime is 1221102133. The next prime is 1221102151. The reversal of 1221102134 is 4312011221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221102133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43610777 + ... + 43610804.

It is an arithmetic number, because the mean of its divisors is an integer number (261664746).

Almost surely, 2^1221102134 is an apocalyptic number.

1221102134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221102134 is a deficient number, since it is larger than the sum of its proper divisors (872215834).

1221102134 is an equidigital number, since it uses as much as digits as its factorization.

1221102134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87221590.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1221102134 is about 34944.2718338786. The cubic root of 1221102134 is about 1068.8513991364.

Adding to 1221102134 its reverse (4312011221), we get a palindrome (5533113355).

The spelling of 1221102134 in words is "one billion, two hundred twenty-one million, one hundred two thousand, one hundred thirty-four".