21110010222101 has 8 divisors (see below), whose sum is σ = 21859584792600. Its totient is φ = 20361878530560.

The previous prime is 21110010222061. The next prime is 21110010222109. The reversal of 21110010222101 is 10122201001112.

It can be written as a sum of positive squares in 4 ways, for example, as 4122629741476 + 16987380480625 = 2030426^2 + 4121575^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21110010222101 - 2¹⁴ = 21110010205717 is a prime.

It is a super-2 number, since 2×21110010222101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110010222109) 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, 360689960 + ... + 360748481.

It is an arithmetic number, because the mean of its divisors is an integer number (2732448099075).

Almost surely, 2^{21110010222101} is an apocalyptic number.

It is an amenable number.

21110010222101 is a deficient number, since it is larger than the sum of its proper divisors (749574570499).

21110010222101 is a wasteful number, since it uses less digits than its factorization.

21110010222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721439479.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110010222101 its reverse (10122201001112), we get a palindrome (31232211223213).

The spelling of 21110010222101 in words is "twenty-one trillion, one hundred ten billion, ten million, two hundred twenty-two thousand, one hundred one".