1221302201021 has 8 divisors (see below), whose sum is σ = 1415432732544. Its totient is φ = 1032086366640.

The previous prime is 1221302200969. The next prime is 1221302201039. The reversal of 1221302201021 is 1201022031221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1221302201021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221302201051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1228673750 + ... + 1228674743.

It is an arithmetic number, because the mean of its divisors is an integer number (176929091568).

Almost surely, 2^{1221302201021} is an apocalyptic number.

It is an amenable number.

1221302201021 is a deficient number, since it is larger than the sum of its proper divisors (194130531523).

1221302201021 is an equidigital number, since it uses as much as digits as its factorization.

1221302201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457348571.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221302201021 its reverse (1201022031221), we get a palindrome (2422324232242).

The spelling of 1221302201021 in words is "one trillion, two hundred twenty-one billion, three hundred two million, two hundred one thousand, twenty-one".