22423204032121 has 4 divisors (see below), whose sum is σ = 22573695334500. Its totient is φ = 22272712729744.

The previous prime is 22423204032101. The next prime is 22423204032139. The reversal of 22423204032121 is 12123040232422.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2882728579600 + 19540475452521 = 1697860^2 + 4420461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22423204032121 is a prime.

It is a super-2 number, since 2×22423204032121² (a number of 28 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 22423204032121.

It is not an unprimeable number, because it can be changed into a prime (22423204032101) 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, 75245650966 + ... + 75245651263.

It is an arithmetic number, because the mean of its divisors is an integer number (5643423833625).

Almost surely, 2^{22423204032121} is an apocalyptic number.

It is an amenable number.

22423204032121 is a deficient number, since it is larger than the sum of its proper divisors (150491302379).

22423204032121 is a wasteful number, since it uses less digits than its factorization.

22423204032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150491302378.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 22423204032121 its reverse (12123040232422), we get a palindrome (34546244264543).

The spelling of 22423204032121 in words is "twenty-two trillion, four hundred twenty-three billion, two hundred four million, thirty-two thousand, one hundred twenty-one".