1221111135130 has 16 divisors (see below), whose sum is σ = 2234032831944. Its totient is φ = 480437167680.

The previous prime is 1221111135121. The next prime is 1221111135151. The reversal of 1221111135130 is 315311111221.

It can be written as a sum of positive squares in 4 ways, for example, as 912363101329 + 308748033801 = 955177^2 + 555651^2 .

It is a super-2 number, since 2×1221111135130² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000910157 + ... + 1000911376.

Almost surely, 2^{1221111135130} is an apocalyptic number.

1221111135130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221111135130 is a deficient number, since it is larger than the sum of its proper divisors (1012921696814).

1221111135130 is a wasteful number, since it uses less digits than its factorization.

1221111135130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001821601.

The product of its (nonzero) digits is 180, while the sum is 22.

Adding to 1221111135130 its reverse (315311111221), we get a palindrome (1536422246351).

The spelling of 1221111135130 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred thirty-five thousand, one hundred thirty".