21120211201201 has 16 divisors (see below), whose sum is σ = 24969982521600. Its totient is φ = 17478603188928.

The previous prime is 21120211201181. The next prime is 21120211201247. The reversal of 21120211201201 is 10210211202112.

It is not a de Polignac number, because 21120211201201 - 2⁵ = 21120211201169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120211201291) 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, 19687971 + ... + 20732983.

It is an arithmetic number, because the mean of its divisors is an integer number (1560623907600).

Almost surely, 2^{21120211201201} is an apocalyptic number.

It is an amenable number.

21120211201201 is a deficient number, since it is larger than the sum of its proper divisors (3849771320399).

21120211201201 is a wasteful number, since it uses less digits than its factorization.

21120211201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144608.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21120211201201 its reverse (10210211202112), we get a palindrome (31330422403313).

The spelling of 21120211201201 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, two hundred one thousand, two hundred one".