1212120020111 has 64 divisors (see below), whose sum is σ = 1678029889536. Its totient is φ = 845074339200.

The previous prime is 1212120020099. The next prime is 1212120020147. The reversal of 1212120020111 is 1110200212121.

It is not a de Polignac number, because 1212120020111 - 2¹⁴ = 1212120003727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212120020191) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5531150 + ... + 5746116.

It is an arithmetic number, because the mean of its divisors is an integer number (26219217024).

Almost surely, 2^{1212120020111} is an apocalyptic number.

1212120020111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212120020111 is a deficient number, since it is larger than the sum of its proper divisors (465909869425).

1212120020111 is a wasteful number, since it uses less digits than its factorization.

1212120020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215172.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212120020111 its reverse (1110200212121), we get a palindrome (2322320232232).

The spelling of 1212120020111 in words is "one trillion, two hundred twelve billion, one hundred twenty million, twenty thousand, one hundred eleven".