1221036301221 has 12 divisors (see below), whose sum is σ = 1789507747776. Its totient is φ = 740022000520.

The previous prime is 1221036301183. The next prime is 1221036301283.

1221036301221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1221036301221 - 2¹⁷ = 1221036170149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221036301191 and 1221036301200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221036301721) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1681867821 + ... + 1681868546.

It is an arithmetic number, because the mean of its divisors is an integer number (149125645648).

Almost surely, 2^{1221036301221} is an apocalyptic number.

1221036301221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1221036301221 is a deficient number, since it is larger than the sum of its proper divisors (568471446555).

1221036301221 is a wasteful number, since it uses less digits than its factorization.

1221036301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363736392 (or 3363736381 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The spelling of 1221036301221 in words is "one trillion, two hundred twenty-one billion, thirty-six million, three hundred one thousand, two hundred twenty-one".