1212222012111 has 48 divisors (see below), whose sum is σ = 2025520237728. Its totient is φ = 690441523200.

The previous prime is 1212222012101. The next prime is 1212222012119. The reversal of 1212222012111 is 1112102222121.

It is not a de Polignac number, because 1212222012111 - 2⁹ = 1212222011599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212222012119) 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, 607431 + ... + 1671351.

It is an arithmetic number, because the mean of its divisors is an integer number (42198338286).

Almost surely, 2^{1212222012111} is an apocalyptic number.

1212222012111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212222012111 is a deficient number, since it is larger than the sum of its proper divisors (813298225617).

1212222012111 is a wasteful number, since it uses less digits than its factorization.

1212222012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064632 (or 1064629 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212222012111 its reverse (1112102222121), we get a palindrome (2324324234232).

The spelling of 1212222012111 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, twelve thousand, one hundred eleven".