1002211121091 has 16 divisors (see below), whose sum is σ = 1364474255904. Its totient is φ = 654177982464.

The previous prime is 1002211121081. The next prime is 1002211121113. The reversal of 1002211121091 is 1901211122001.

It is not a de Polignac number, because 1002211121091 - 2⁵ = 1002211121059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002211121081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16671846 + ... + 16731851.

It is an arithmetic number, because the mean of its divisors is an integer number (85279640994).

Almost surely, 2^{1002211121091} is an apocalyptic number.

1002211121091 is a deficient number, since it is larger than the sum of its proper divisors (362263134813).

1002211121091 is a wasteful number, since it uses less digits than its factorization.

1002211121091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33403910.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 1002211121091 its reverse (1901211122001), we get a palindrome (2903422243092).

The spelling of 1002211121091 in words is "one trillion, two billion, two hundred eleven million, one hundred twenty-one thousand, ninety-one".