1212211011011 has 48 divisors (see below), whose sum is σ = 1639895781888. Its totient is φ = 870125068800.

The previous prime is 1212211011007. The next prime is 1212211011017. The reversal of 1212211011011 is 1101101122121.

It is not a de Polignac number, because 1212211011011 - 2² = 1212211011007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212211011017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6241691 + ... + 6432971.

It is an arithmetic number, because the mean of its divisors is an integer number (34164495456).

Almost surely, 2^{1212211011011} is an apocalyptic number.

1212211011011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212211011011 is a deficient number, since it is larger than the sum of its proper divisors (427684770877).

1212211011011 is a wasteful number, since it uses less digits than its factorization.

1212211011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191812 (or 191799 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1212211011011 its reverse (1101101122121), we get a palindrome (2313312133132).

It can be divided in two parts, 12122110 and 11011, that added together give a palindrome (12133121).

The spelling of 1212211011011 in words is "one trillion, two hundred twelve billion, two hundred eleven million, eleven thousand, eleven".