21142411220201 has 4 divisors (see below), whose sum is σ = 21142436450772. Its totient is φ = 21142385989632.

The previous prime is 21142411220083. The next prime is 21142411220209. The reversal of 21142411220201 is 10202211424112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12389688970201 + 8752722250000 = 3519899^2 + 2958500^2 .

It is a cyclic number.

It is not a de Polignac number, because 21142411220201 - 2²² = 21142407025897 is a prime.

It is a super-2 number, since 2×21142411220201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21142411220209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11313560 + ... + 13049193.

It is an arithmetic number, because the mean of its divisors is an integer number (5285609112693).

Almost surely, 2^{21142411220201} is an apocalyptic number.

It is an amenable number.

21142411220201 is a deficient number, since it is larger than the sum of its proper divisors (25230571).

21142411220201 is an equidigital number, since it uses as much as digits as its factorization.

21142411220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25230570.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 21142411220201 its reverse (10202211424112), we get a palindrome (31344622644313).

The spelling of 21142411220201 in words is "twenty-one trillion, one hundred forty-two billion, four hundred eleven million, two hundred twenty thousand, two hundred one".