1000011201221 has 8 divisors (see below), whose sum is σ = 1023330215424. Its totient is φ = 976695048000.

The previous prime is 1000011201209. The next prime is 1000011201251. The reversal of 1000011201221 is 1221021100001.

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 1000011201221 - 2¹⁰ = 1000011200197 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 (1000011201251) 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, 221 + ... + 1414221.

It is an arithmetic number, because the mean of its divisors is an integer number (127916276928).

Almost surely, 2^{1000011201221} is an apocalyptic number.

It is an amenable number.

1000011201221 is a deficient number, since it is larger than the sum of its proper divisors (23319014203).

1000011201221 is a wasteful number, since it uses less digits than its factorization.

1000011201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430491.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1000011201221 its reverse (1221021100001), we get a palindrome (2221032301222).

The spelling of 1000011201221 in words is "one trillion, eleven million, two hundred one thousand, two hundred twenty-one".