21331201101 has 16 divisors (see below), whose sum is σ = 32509298304. Its totient is φ = 12187528704.

The previous prime is 21331201069. The next prime is 21331201103. The reversal of 21331201101 is 10110213312.

It is a happy number.

It is not a de Polignac number, because 21331201101 - 2⁵ = 21331201069 is a prime.

It is a super-2 number, since 2×21331201101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331201103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87765 + ... + 224421.

It is an arithmetic number, because the mean of its divisors is an integer number (2031831144).

Almost surely, 2^21331201101 is an apocalyptic number.

21331201101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21331201101 is a deficient number, since it is larger than the sum of its proper divisors (11178097203).

21331201101 is a wasteful number, since it uses less digits than its factorization.

21331201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144100.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21331201101 its reverse (10110213312), we get a palindrome (31441414413).

The spelling of 21331201101 in words is "twenty-one billion, three hundred thirty-one million, two hundred one thousand, one hundred one".