21112210121201 has 4 divisors (see below), whose sum is σ = 21116749409904. Its totient is φ = 21107670832500.

The previous prime is 21112210121131. The next prime is 21112210121207. The reversal of 21112210121201 is 10212101221112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112210121201 is a prime.

It is a super-3 number, since 3×21112210121201³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21112210121201.

It is not an unprimeable number, because it can be changed into a prime (21112210121207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269637375 + ... + 2269646676.

It is an arithmetic number, because the mean of its divisors is an integer number (5279187352476).

Almost surely, 2^{21112210121201} is an apocalyptic number.

It is an amenable number.

21112210121201 is a deficient number, since it is larger than the sum of its proper divisors (4539288703).

21112210121201 is an equidigital number, since it uses as much as digits as its factorization.

21112210121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539288702.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112210121201 its reverse (10212101221112), we get a palindrome (31324311342313).

The spelling of 21112210121201 in words is "twenty-one trillion, one hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, two hundred one".