1000120101221 has 8 divisors (see below), whose sum is σ = 1002261708864. Its totient is φ = 997980475360.

The previous prime is 1000120101209. The next prime is 1000120101271. The reversal of 1000120101221 is 1221010210001.

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 1000120101221 - 2²² = 1000115906917 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 (1000120101271) 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 7 ways as a sum of consecutive naturals, for example, 517160 + ... + 1505886.

It is an arithmetic number, because the mean of its divisors is an integer number (125282713608).

Almost surely, 2^{1000120101221} is an apocalyptic number.

It is an amenable number.

1000120101221 is a deficient number, since it is larger than the sum of its proper divisors (2141607643).

1000120101221 is an equidigital number, since it uses as much as digits as its factorization.

1000120101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990891.

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

Adding to 1000120101221 its reverse (1221010210001), we get a palindrome (2221130311222).

The spelling of 1000120101221 in words is "one trillion, one hundred twenty million, one hundred one thousand, two hundred twenty-one".