212111120001091 has 2 divisors, whose sum is σ = 212111120001092. Its totient is φ = 212111120001090.

The previous prime is 212111120001083. The next prime is 212111120001203. The reversal of 212111120001091 is 190100021111212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212111120001091 - 2³ = 212111120001083 is a prime.

It is a super-2 number, since 2×212111120001091² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212111120001041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055560000545 + 106055560000546.

It is an arithmetic number, because the mean of its divisors is an integer number (106055560000546).

Almost surely, 2^{212111120001091} is an apocalyptic number.

212111120001091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212111120001091 is an equidigital number, since it uses as much as digits as its factorization.

212111120001091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 212111120001091 in words is "two hundred twelve trillion, one hundred eleven billion, one hundred twenty million, one thousand, ninety-one".