21120221202201 has 24 divisors (see below), whose sum is σ = 33291358079616. Its totient is φ = 12795899631840.

The previous prime is 21120221202193. The next prime is 21120221202211. The reversal of 21120221202201 is 10220212202112.

It is a happy number.

21120221202201 is a `hidden beast` number, since 21 + 1 + 20 + 221 + 202 + 201 = 666.

It is not a de Polignac number, because 21120221202201 - 2³ = 21120221202193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120221202211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34986130 + ... + 35584683.

It is an arithmetic number, because the mean of its divisors is an integer number (1387139919984).

Almost surely, 2^{21120221202201} is an apocalyptic number.

It is an amenable number.

21120221202201 is a deficient number, since it is larger than the sum of its proper divisors (12171136877415).

21120221202201 is a wasteful number, since it uses less digits than its factorization.

21120221202201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70573853 (or 70573850 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21120221202201 its reverse (10220212202112), we get a palindrome (31340433404313).

The spelling of 21120221202201 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, two hundred two thousand, two hundred one".