1212211212011 has 8 divisors (see below), whose sum is σ = 1304559029664. Its totient is φ = 1122201313920.

The previous prime is 1212211211999. The next prime is 1212211212029. The reversal of 1212211212011 is 1102121122121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212211212011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212211212041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584478815 + ... + 584480888.

It is an arithmetic number, because the mean of its divisors is an integer number (163069878708).

Almost surely, 2^{1212211212011} is an apocalyptic number.

1212211212011 is a deficient number, since it is larger than the sum of its proper divisors (92347817653).

1212211212011 is a wasteful number, since it uses less digits than its factorization.

1212211212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168959781.

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

Adding to 1212211212011 its reverse (1102121122121), we get a palindrome (2314332334132).

The spelling of 1212211212011 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred twelve thousand, eleven".