2121011011187 has 2 divisors, whose sum is σ = 2121011011188. Its totient is φ = 2121011011186.

The previous prime is 2121011011159. The next prime is 2121011011201. The reversal of 2121011011187 is 7811101101212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121011011187 - 2¹² = 2121011007091 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121011011787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060505505593 + 1060505505594.

It is an arithmetic number, because the mean of its divisors is an integer number (1060505505594).

Almost surely, 2^{2121011011187} is an apocalyptic number.

2121011011187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121011011187 is an equidigital number, since it uses as much as digits as its factorization.

2121011011187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 26.

Adding to 2121011011187 its reverse (7811101101212), we get a palindrome (9932112112399).

The spelling of 2121011011187 in words is "two trillion, one hundred twenty-one billion, eleven million, eleven thousand, one hundred eighty-seven".