21200222121123 has 16 divisors (see below), whose sum is σ = 28272310352000. Its totient is φ = 14130807929280.

The previous prime is 21200222120989. The next prime is 21200222121131. The reversal of 21200222121123 is 32112122200212.

It is not a de Polignac number, because 21200222121123 - 2¹⁴ = 21200222104739 is a prime.

It is a super-2 number, since 2×21200222121123² (a number of 27 digits) contains 22 as substring.

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 21200222121123.

It is not an unprimeable number, because it can be changed into a prime (21200222121223) 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, 520882428 + ... + 520923126.

It is an arithmetic number, because the mean of its divisors is an integer number (1767019397000).

Almost surely, 2^{21200222121123} is an apocalyptic number.

21200222121123 is a deficient number, since it is larger than the sum of its proper divisors (7072088230877).

21200222121123 is a wasteful number, since it uses less digits than its factorization.

21200222121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69282.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21200222121123 its reverse (32112122200212), we get a palindrome (53312344321335).

The spelling of 21200222121123 in words is "twenty-one trillion, two hundred billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-three".