211332129091 has 2 divisors, whose sum is σ = 211332129092. Its totient is φ = 211332129090.

The previous prime is 211332129079. The next prime is 211332129109. The reversal of 211332129091 is 190921233112.

Together with next prime (211332129109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211332129091 - 2²³ = 211323740483 is a prime.

It is a super-2 number, since 2×211332129091² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211332129061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105666064545 + 105666064546.

It is an arithmetic number, because the mean of its divisors is an integer number (105666064546).

Almost surely, 2^211332129091 is an apocalyptic number.

211332129091 is a deficient number, since it is larger than the sum of its proper divisors (1).

211332129091 is an equidigital number, since it uses as much as digits as its factorization.

211332129091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

It can be divided in two parts, 2113321 and 29091, that added together give a palindrome (2142412).

The spelling of 211332129091 in words is "two hundred eleven billion, three hundred thirty-two million, one hundred twenty-nine thousand, ninety-one".