23203202001221 has 16 divisors (see below), whose sum is σ = 26645076610560. Its totient is φ = 19983430439280.

The previous prime is 23203202001173. The next prime is 23203202001241. The reversal of 23203202001221 is 12210020230232.

It is a happy number.

It is not a de Polignac number, because 23203202001221 - 2¹⁰ = 23203202000197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23203202001193 and 23203202001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23203202001241) 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, 24550790 + ... + 25478376.

It is an arithmetic number, because the mean of its divisors is an integer number (1665317288160).

Almost surely, 2^{23203202001221} is an apocalyptic number.

It is an amenable number.

23203202001221 is a deficient number, since it is larger than the sum of its proper divisors (3441874609339).

23203202001221 is a wasteful number, since it uses less digits than its factorization.

23203202001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047304.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 23203202001221 its reverse (12210020230232), we get a palindrome (35413222231453).

The spelling of 23203202001221 in words is "twenty-three trillion, two hundred three billion, two hundred two million, one thousand, two hundred twenty-one".