1221121341 has 48 divisors (see below), whose sum is σ = 2006065152. Its totient is φ = 709063200.

The previous prime is 1221121337. The next prime is 1221121367. The reversal of 1221121341 is 1431211221.

It is not a de Polignac number, because 1221121341 - 2² = 1221121337 is a prime.

It is a super-2 number, since 2×1221121341² = 2982274658891276562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221121331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 314176 + ... + 318038.

It is an arithmetic number, because the mean of its divisors is an integer number (41793024).

Almost surely, 2^1221121341 is an apocalyptic number.

1221121341 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1221121341 is a deficient number, since it is larger than the sum of its proper divisors (784943811).

1221121341 is a wasteful number, since it uses less digits than its factorization.

1221121341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014 (or 4011 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1221121341 is about 34944.5466560950. The cubic root of 1221121341 is about 1068.8570031779.

Adding to 1221121341 its reverse (1431211221), we get a palindrome (2652332562).

The spelling of 1221121341 in words is "one billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred forty-one".