21101222100201 has 8 divisors (see below), whose sum is σ = 28134996858624. Its totient is φ = 14067464370960.

The previous prime is 21101222100193. The next prime is 21101222100223. The reversal of 21101222100201 is 10200122210112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21101222100201 - 2³ = 21101222100193 is a prime.

It is a super-2 number, since 2×21101222100201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101222107201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012770 + ... + 6574811.

It is an arithmetic number, because the mean of its divisors is an integer number (3516874607328).

Almost surely, 2^{21101222100201} is an apocalyptic number.

It is an amenable number.

21101222100201 is a deficient number, since it is larger than the sum of its proper divisors (7033774758423).

21101222100201 is an equidigital number, since it uses as much as digits as its factorization.

21101222100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8514591.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21101222100201 its reverse (10200122210112), we get a palindrome (31301344310313).

The spelling of 21101222100201 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-two million, one hundred thousand, two hundred one".