21120221202232 has 8 divisors (see below), whose sum is σ = 39600414754200. Its totient is φ = 10560110601112.

The previous prime is 21120221202211. The next prime is 21120221202233. The reversal of 21120221202232 is 23220212202112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120221202233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320013825132 + ... + 1320013825147.

It is an arithmetic number, because the mean of its divisors is an integer number (4950051844275).

Almost surely, 2^{21120221202232} is an apocalyptic number.

It is an amenable number.

21120221202232 is a deficient number, since it is larger than the sum of its proper divisors (18480193551968).

21120221202232 is a wasteful number, since it uses less digits than its factorization.

21120221202232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640027650285 (or 2640027650281 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21120221202232 its reverse (23220212202112), we get a palindrome (44340433404344).

The spelling of 21120221202232 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, two hundred two thousand, two hundred thirty-two".