1211011122122 has 4 divisors (see below), whose sum is σ = 1816516683186. Its totient is φ = 605505561060.

The previous prime is 1211011122121. The next prime is 1211011122193. The reversal of 1211011122122 is 2212211101121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1188080380081 + 22930742041 = 1089991^2 + 151429^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1211011122122.

It is not an unprimeable number, because it can be changed into a prime (1211011122121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302752780529 + ... + 302752780532.

Almost surely, 2^{1211011122122} is an apocalyptic number.

1211011122122 is a deficient number, since it is larger than the sum of its proper divisors (605505561064).

1211011122122 is an equidigital number, since it uses as much as digits as its factorization.

1211011122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605505561063.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1211011122122 its reverse (2212211101121), we get a palindrome (3423222223243).

The spelling of 1211011122122 in words is "one trillion, two hundred eleven billion, eleven million, one hundred twenty-two thousand, one hundred twenty-two".