1212220211011 has 4 divisors (see below), whose sum is σ = 1213641337552. Its totient is φ = 1210799084472.

The previous prime is 1212220210997. The next prime is 1212220211017. The reversal of 1212220211011 is 1101120222121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212220211011 - 2⁵ = 1212220210979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212220211017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 710561991 + ... + 710563696.

It is an arithmetic number, because the mean of its divisors is an integer number (303410334388).

Almost surely, 2^{1212220211011} is an apocalyptic number.

1212220211011 is a deficient number, since it is larger than the sum of its proper divisors (1421126541).

1212220211011 is an equidigital number, since it uses as much as digits as its factorization.

1212220211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421126540.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212220211011 its reverse (1101120222121), we get a palindrome (2313340433132).

The spelling of 1212220211011 in words is "one trillion, two hundred twelve billion, two hundred twenty million, two hundred eleven thousand, eleven".