2011212121097 has 2 divisors, whose sum is σ = 2011212121098. Its totient is φ = 2011212121096.

The previous prime is 2011212121091. The next prime is 2011212121109. The reversal of 2011212121097 is 7901212121102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1680507766336 + 330704354761 = 1296344^2 + 575069^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011212121097 - 2³⁰ = 2010138379273 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011212121091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005606060548 + 1005606060549.

It is an arithmetic number, because the mean of its divisors is an integer number (1005606060549).

Almost surely, 2^{2011212121097} is an apocalyptic number.

It is an amenable number.

2011212121097 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011212121097 is an equidigital number, since it uses as much as digits as its factorization.

2011212121097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 29.

Adding to 2011212121097 its reverse (7901212121102), we get a palindrome (9912424242199).

The spelling of 2011212121097 in words is "two trillion, eleven billion, two hundred twelve million, one hundred twenty-one thousand, ninety-seven".