222121110002111 has 4 divisors (see below), whose sum is σ = 235187057649312. Its totient is φ = 209055162354912.

The previous prime is 222121110002021. The next prime is 222121110002119. The reversal of 222121110002111 is 111200011121222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222121110002111 - 2²² = 222121105807807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 13065947647183 = 222121110002111 / (2 + 2 + 2 + 1 + 2 + 1 + 1 + 1 + 0 + 0 + 0 + 2 + 1 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222121110002111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121110002119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6532973823575 + ... + 6532973823608.

It is an arithmetic number, because the mean of its divisors is an integer number (58796764412328).

Almost surely, 2^{222121110002111} is an apocalyptic number.

222121110002111 is a deficient number, since it is larger than the sum of its proper divisors (13065947647201).

222121110002111 is a wasteful number, since it uses less digits than its factorization.

222121110002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13065947647200.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 222121110002111 its reverse (111200011121222), we get a palindrome (333321121123333).

The spelling of 222121110002111 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred ten million, two thousand, one hundred eleven".