1212220022111 has 16 divisors (see below), whose sum is σ = 1430124208128. Its totient is φ = 1005500174400.

The previous prime is 1212220022099. The next prime is 1212220022129. The reversal of 1212220022111 is 1112200222121.

It is a cyclic number.

It is not a de Polignac number, because 1212220022111 - 2²² = 1212215827807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212220022111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212220022131) 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, 12230891 + ... + 12329603.

It is an arithmetic number, because the mean of its divisors is an integer number (89382763008).

Almost surely, 2^{1212220022111} is an apocalyptic number.

1212220022111 is a deficient number, since it is larger than the sum of its proper divisors (217904186017).

1212220022111 is an equidigital number, since it uses as much as digits as its factorization.

1212220022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155342.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212220022111 its reverse (1112200222121), we get a palindrome (2324420244232).

The spelling of 1212220022111 in words is "one trillion, two hundred twelve billion, two hundred twenty million, twenty-two thousand, one hundred eleven".