22012121220111 has 48 divisors (see below), whose sum is σ = 35852029768800. Its totient is φ = 13337934445440.

The previous prime is 22012121220049. The next prime is 22012121220113. The reversal of 22012121220111 is 11102212121022.

22012121220111 is a `hidden beast` number, since 220 + 1 + 21 + 212 + 201 + 11 = 666.

It is not a de Polignac number, because 22012121220111 - 2¹⁷ = 22012121089039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012121220113) 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, 15242395 + ... + 16623923.

It is an arithmetic number, because the mean of its divisors is an integer number (746917286850).

Almost surely, 2^{22012121220111} is an apocalyptic number.

22012121220111 is a deficient number, since it is larger than the sum of its proper divisors (13839908548689).

22012121220111 is a wasteful number, since it uses less digits than its factorization.

22012121220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386437 (or 1386420 counting only the distinct ones).

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

Adding to 22012121220111 its reverse (11102212121022), we get a palindrome (33114333341133).

The spelling of 22012121220111 in words is "twenty-two trillion, twelve billion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".