10211220021187 has 2 divisors, whose sum is σ = 10211220021188. Its totient is φ = 10211220021186.

The previous prime is 10211220021181. The next prime is 10211220021251. The reversal of 10211220021187 is 78112002211201.

10211220021187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10211220021187 - 2³ = 10211220021179 is a prime.

It is not a weakly prime, because it can be changed into another prime (10211220021181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105610010593 + 5105610010594.

It is an arithmetic number, because the mean of its divisors is an integer number (5105610010594).

Almost surely, 2^{10211220021187} is an apocalyptic number.

10211220021187 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211220021187 is an equidigital number, since it uses as much as digits as its factorization.

10211220021187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 28.

Adding to 10211220021187 its reverse (78112002211201), we get a palindrome (88323222232388).

The spelling of 10211220021187 in words is "ten trillion, two hundred eleven billion, two hundred twenty million, twenty-one thousand, one hundred eighty-seven".