1221420102241 has 32 divisors (see below), whose sum is σ = 1321479331200. Its totient is φ = 1125133701120.

The previous prime is 1221420102163. The next prime is 1221420102247. The reversal of 1221420102241 is 1422010241221.

It is a cyclic number.

It is not a de Polignac number, because 1221420102241 - 2¹¹ = 1221420100193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221420102247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 513848245 + ... + 513850621.

It is an arithmetic number, because the mean of its divisors is an integer number (41296229100).

Almost surely, 2^{1221420102241} is an apocalyptic number.

It is an amenable number.

1221420102241 is a deficient number, since it is larger than the sum of its proper divisors (100059228959).

1221420102241 is a wasteful number, since it uses less digits than its factorization.

1221420102241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 1221420102241 its reverse (1422010241221), we get a palindrome (2643430343462).

The spelling of 1221420102241 in words is "one trillion, two hundred twenty-one billion, four hundred twenty million, one hundred two thousand, two hundred forty-one".