1221011202201 has 8 divisors (see below), whose sum is σ = 1860588498624. Its totient is φ = 697720686960.

The previous prime is 1221011202193. The next prime is 1221011202217. The reversal of 1221011202201 is 1022021101221.

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

It is not a de Polignac number, because 1221011202201 - 2³ = 1221011202193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221011202221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29071695270 + ... + 29071695311.

It is an arithmetic number, because the mean of its divisors is an integer number (232573562328).

Almost surely, 2^{1221011202201} is an apocalyptic number.

It is an amenable number.

1221011202201 is a deficient number, since it is larger than the sum of its proper divisors (639577296423).

1221011202201 is an equidigital number, since it uses as much as digits as its factorization.

1221011202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58143390591.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221011202201 its reverse (1022021101221), we get a palindrome (2243032303422).

The spelling of 1221011202201 in words is "one trillion, two hundred twenty-one billion, eleven million, two hundred two thousand, two hundred one".