21222012002111 has 8 divisors (see below), whose sum is σ = 22480860954384. Its totient is φ = 19964329194880.

The previous prime is 21222012002057. The next prime is 21222012002141. The reversal of 21222012002111 is 11120021022212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222012002111 - 2⁴² = 16823965491007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21222012002111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222012002141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291498785 + ... + 291571578.

It is an arithmetic number, because the mean of its divisors is an integer number (2810107619298).

Almost surely, 2^{21222012002111} is an apocalyptic number.

21222012002111 is a deficient number, since it is larger than the sum of its proper divisors (1258848952273).

21222012002111 is a wasteful number, since it uses less digits than its factorization.

21222012002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583072521.

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

Adding to 21222012002111 its reverse (11120021022212), we get a palindrome (32342033024323).

The spelling of 21222012002111 in words is "twenty-one trillion, two hundred twenty-two billion, twelve million, two thousand, one hundred eleven".