1212021112211 has 24 divisors (see below), whose sum is σ = 1518785583840. Its totient is φ = 958690518912.

The previous prime is 1212021112201. The next prime is 1212021112243. The reversal of 1212021112211 is 1122111202121.

It is not a de Polignac number, because 1212021112211 - 2⁶ = 1212021112147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212021112211.

It is not an unprimeable number, because it can be changed into a prime (1212021112201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1999775 + ... + 2534391.

It is an arithmetic number, because the mean of its divisors is an integer number (63282732660).

Almost surely, 2^{1212021112211} is an apocalyptic number.

1212021112211 is a deficient number, since it is larger than the sum of its proper divisors (306764471629).

1212021112211 is a wasteful number, since it uses less digits than its factorization.

1212021112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538203 (or 538196 counting only the distinct ones).

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

Adding to 1212021112211 its reverse (1122111202121), we get a palindrome (2334132314332).

The spelling of 1212021112211 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred twelve thousand, two hundred eleven".