21121212022003 has 4 divisors (see below), whose sum is σ = 21255742035040. Its totient is φ = 20986682008968.

The previous prime is 21121212021997. The next prime is 21121212022021. The reversal of 21121212022003 is 30022021212112.

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 21121212022003 - 2⁴¹ = 18922188766451 is a prime.

It is a super-2 number, since 2×21121212022003² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121212022103) 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, 67265006283 + ... + 67265006596.

It is an arithmetic number, because the mean of its divisors is an integer number (5313935508760).

Almost surely, 2^{21121212022003} is an apocalyptic number.

21121212022003 is a deficient number, since it is larger than the sum of its proper divisors (134530013037).

21121212022003 is a wasteful number, since it uses less digits than its factorization.

21121212022003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134530013036.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21121212022003 its reverse (30022021212112), we get a palindrome (51143233234115).

The spelling of 21121212022003 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twelve million, twenty-two thousand, three".