1221013021201 has 8 divisors (see below), whose sum is σ = 1223255832480. Its totient is φ = 1218770473632.

The previous prime is 1221013021117. The next prime is 1221013021211. The reversal of 1221013021201 is 1021203101221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221013021201 - 2⁷ = 1221013021073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221013021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10854421 + ... + 10966333.

It is an arithmetic number, because the mean of its divisors is an integer number (152906979060).

Almost surely, 2^{1221013021201} is an apocalyptic number.

It is an amenable number.

1221013021201 is a deficient number, since it is larger than the sum of its proper divisors (2242811279).

1221013021201 is a wasteful number, since it uses less digits than its factorization.

1221013021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131855.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221013021201 its reverse (1021203101221), we get a palindrome (2242216122422).

The spelling of 1221013021201 in words is "one trillion, two hundred twenty-one billion, thirteen million, twenty-one thousand, two hundred one".