20210211012091 has 2 divisors, whose sum is σ = 20210211012092. Its totient is φ = 20210211012090.

The previous prime is 20210211011993. The next prime is 20210211012097. The reversal of 20210211012091 is 19021011201202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20210211012091 - 2¹⁷ = 20210210881019 is a prime.

It is not a weakly prime, because it can be changed into another prime (20210211012097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105105506045 + 10105105506046.

It is an arithmetic number, because the mean of its divisors is an integer number (10105105506046).

Almost surely, 2^{20210211012091} is an apocalyptic number.

20210211012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210211012091 is an equidigital number, since it uses as much as digits as its factorization.

20210211012091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 20210211012091 its reverse (19021011201202), we get a palindrome (39231222213293).

The spelling of 20210211012091 in words is "twenty trillion, two hundred ten billion, two hundred eleven million, twelve thousand, ninety-one".