1000002121091 has 2 divisors, whose sum is σ = 1000002121092. Its totient is φ = 1000002121090.

The previous prime is 1000002121073. The next prime is 1000002121099. The reversal of 1000002121091 is 1901212000001.

1000002121091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000002121091 - 2²² = 999997926787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000002121099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500001060545 + 500001060546.

It is an arithmetic number, because the mean of its divisors is an integer number (500001060546).

Almost surely, 2^{1000002121091} is an apocalyptic number.

1000002121091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000002121091 is an equidigital number, since it uses as much as digits as its factorization.

1000002121091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1000002121091 its reverse (1901212000001), we get a palindrome (2901214121092).

The spelling of 1000002121091 in words is "one trillion, two million, one hundred twenty-one thousand, ninety-one".