1000221121211 has 32 divisors (see below), whose sum is σ = 1094432281152. Its totient is φ = 908605071360.

The previous prime is 1000221121189. The next prime is 1000221121243. The reversal of 1000221121211 is 1121211220001.

It is a cyclic number.

It is not a de Polignac number, because 1000221121211 - 2⁶ = 1000221121147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000221121261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 462849971 + ... + 462852131.

It is an arithmetic number, because the mean of its divisors is an integer number (34201008786).

Almost surely, 2^{1000221121211} is an apocalyptic number.

1000221121211 is a deficient number, since it is larger than the sum of its proper divisors (94211159941).

1000221121211 is a wasteful number, since it uses less digits than its factorization.

1000221121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4383.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1000221121211 its reverse (1121211220001), we get a palindrome (2121432341212).

The spelling of 1000221121211 in words is "one trillion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred eleven".