2001212220187 has 2 divisors, whose sum is σ = 2001212220188. Its totient is φ = 2001212220186.

The previous prime is 2001212220121. The next prime is 2001212220229. The reversal of 2001212220187 is 7810222121002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001212220187 - 2¹¹ = 2001212218139 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001212320187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000606110093 + 1000606110094.

It is an arithmetic number, because the mean of its divisors is an integer number (1000606110094).

Almost surely, 2^{2001212220187} is an apocalyptic number.

2001212220187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001212220187 is an equidigital number, since it uses as much as digits as its factorization.

2001212220187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 2001212220187 its reverse (7810222121002), we get a palindrome (9811434341189).

The spelling of 2001212220187 in words is "two trillion, one billion, two hundred twelve million, two hundred twenty thousand, one hundred eighty-seven".