21011121201202 has 16 divisors (see below), whose sum is σ = 34665982091424. Its totient is φ = 9550509635700.

The previous prime is 21011121201179. The next prime is 21011121201223. The reversal of 21011121201202 is 20210212111012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3946488924 + ... + 3946494247.

It is an arithmetic number, because the mean of its divisors is an integer number (2166623880714).

Almost surely, 2^{21011121201202} is an apocalyptic number.

21011121201202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21011121201202 is a deficient number, since it is larger than the sum of its proper divisors (13654860890222).

21011121201202 is an equidigital number, since it uses as much as digits as its factorization.

21011121201202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7892983206 (or 7892983184 counting only the distinct ones).

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

Adding to 21011121201202 its reverse (20210212111012), we get a palindrome (41221333312214).

The spelling of 21011121201202 in words is "twenty-one trillion, eleven billion, one hundred twenty-one million, two hundred one thousand, two hundred two".