1221241420323 has 12 divisors (see below), whose sum is σ = 1764208777968. Its totient is φ = 814071688560.

The previous prime is 1221241420283. The next prime is 1221241420349. The reversal of 1221241420323 is 3230241421221.

1221241420323 is a `hidden beast` number, since 1 + 2 + 21 + 2 + 414 + 203 + 23 = 666.

It is not a de Polignac number, because 1221241420323 - 2¹⁴ = 1221241403939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221241420723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7351488 + ... + 7515773.

It is an arithmetic number, because the mean of its divisors is an integer number (147017398164).

Almost surely, 2^{1221241420323} is an apocalyptic number.

1221241420323 is a deficient number, since it is larger than the sum of its proper divisors (542967357645).

1221241420323 is a wasteful number, since it uses less digits than its factorization.

1221241420323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14876394 (or 14876391 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1221241420323 its reverse (3230241421221), we get a palindrome (4451482841544).

The spelling of 1221241420323 in words is "one trillion, two hundred twenty-one billion, two hundred forty-one million, four hundred twenty thousand, three hundred twenty-three".