1211001112122 has 16 divisors (see below), whose sum is σ = 2549476025760. Its totient is φ = 382421403792.

The previous prime is 1211001112091. The next prime is 1211001112133. The reversal of 1211001112122 is 2212111001121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5311408273 + ... + 5311408500.

It is an arithmetic number, because the mean of its divisors is an integer number (159342251610).

Almost surely, 2^{1211001112122} is an apocalyptic number.

1211001112122 is an abundant number, since it is smaller than the sum of its proper divisors (1338474913638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211001112122 is a wasteful number, since it uses less digits than its factorization.

1211001112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10622816797.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211001112122 its reverse (2212111001121), we get a palindrome (3423112113243).

The spelling of 1211001112122 in words is "one trillion, two hundred eleven billion, one million, one hundred twelve thousand, one hundred twenty-two".