1222011121111 has 32 divisors (see below), whose sum is σ = 1371753211392. Its totient is φ = 1079274000000.

The previous prime is 1222011121021. The next prime is 1222011121129. The reversal of 1222011121111 is 1111211102221.

It is a cyclic number.

It is not a de Polignac number, because 1222011121111 - 2¹⁹ = 1222010596823 is a prime.

It is a super-2 number, since 2×1222011121111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222011121141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16607181 + ... + 16680601.

It is an arithmetic number, because the mean of its divisors is an integer number (42867287856).

Almost surely, 2^{1222011121111} is an apocalyptic number.

1222011121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1222011121111 is a deficient number, since it is larger than the sum of its proper divisors (149742090281).

1222011121111 is a wasteful number, since it uses less digits than its factorization.

1222011121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73815.

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

Adding to 1222011121111 its reverse (1111211102221), we get a palindrome (2333222223332).

The spelling of 1222011121111 in words is "one trillion, two hundred twenty-two billion, eleven million, one hundred twenty-one thousand, one hundred eleven".