1212211102011 has 16 divisors (see below), whose sum is σ = 1989269501184. Its totient is φ = 639408053664.

The previous prime is 1212211101977. The next prime is 1212211102031. The reversal of 1212211102011 is 1102011122121.

It is a happy number.

It is not a de Polignac number, because 1212211102011 - 2⁷ = 1212211101883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212211102031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2220166581 + ... + 2220167126.

It is an arithmetic number, because the mean of its divisors is an integer number (124329343824).

Almost surely, 2^{1212211102011} is an apocalyptic number.

1212211102011 is a deficient number, since it is larger than the sum of its proper divisors (777058399173).

1212211102011 is a wasteful number, since it uses less digits than its factorization.

1212211102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440333730.

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

Adding to 1212211102011 its reverse (1102011122121), we get a palindrome (2314222224132).

It can be divided in two parts, 1212211 and 102011, that multiplied together give a palindrome (123658856321).

The spelling of 1212211102011 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred two thousand, eleven".