21022061101 has 4 divisors (see below), whose sum is σ = 21022504704. Its totient is φ = 21021617500.

The previous prime is 21022061041. The next prime is 21022061113. The reversal of 21022061101 is 10116022012.

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 not a de Polignac number, because 21022061101 - 2¹⁵ = 21022028333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022061141) 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, 140875 + ... + 248776.

It is an arithmetic number, because the mean of its divisors is an integer number (5255626176).

Almost surely, 2^21022061101 is an apocalyptic number.

It is an amenable number.

21022061101 is a deficient number, since it is larger than the sum of its proper divisors (443603).

21022061101 is an equidigital number, since it uses as much as digits as its factorization.

21022061101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443602.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21022061101 its reverse (10116022012), we get a palindrome (31138083113).

The spelling of 21022061101 in words is "twenty-one billion, twenty-two million, sixty-one thousand, one hundred one".