1221034220135 has 16 divisors (see below), whose sum is σ = 1468312704000. Its totient is φ = 974779980960.

The previous prime is 1221034220129. The next prime is 1221034220141. The reversal of 1221034220135 is 5310224301221.

It is an interprime number because it is at equal distance from previous prime (1221034220129) and next prime (1221034220141).

It is not a de Polignac number, because 1221034220135 - 2³⁰ = 1219960478311 is a prime.

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, 45373094 + ... + 45399996.

It is an arithmetic number, because the mean of its divisors is an integer number (91769544000).

Almost surely, 2^{1221034220135} is an apocalyptic number.

1221034220135 is a deficient number, since it is larger than the sum of its proper divisors (247278483865).

1221034220135 is a wasteful number, since it uses less digits than its factorization.

1221034220135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45598.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1221034220135 its reverse (5310224301221), we get a palindrome (6531258521356).

The spelling of 1221034220135 in words is "one trillion, two hundred twenty-one billion, thirty-four million, two hundred twenty thousand, one hundred thirty-five".