21022101111201 has 4 divisors (see below), whose sum is σ = 28029468148272. Its totient is φ = 14014734074132.

The previous prime is 21022101111191. The next prime is 21022101111211. The reversal of 21022101111201 is 10211110122012.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (21022101111191) and next prime (21022101111211).

It is a cyclic number.

It is not a de Polignac number, because 21022101111201 - 2¹⁰ = 21022101110177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022101111211) 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, 3503683518531 + ... + 3503683518536.

It is an arithmetic number, because the mean of its divisors is an integer number (7007367037068).

Almost surely, 2^{21022101111201} is an apocalyptic number.

It is an amenable number.

21022101111201 is a deficient number, since it is larger than the sum of its proper divisors (7007367037071).

21022101111201 is an equidigital number, since it uses as much as digits as its factorization.

21022101111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007367037070.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21022101111201 its reverse (10211110122012), we get a palindrome (31233211233213).

The spelling of 21022101111201 in words is "twenty-one trillion, twenty-two billion, one hundred one million, one hundred eleven thousand, two hundred one".