21101101131 has 16 divisors (see below), whose sum is σ = 32497953408. Its totient is φ = 12036278400.

The previous prime is 21101101081. The next prime is 21101101139. The reversal of 21101101131 is 13110110112.

It is not a de Polignac number, because 21101101131 - 2¹³ = 21101092939 is a prime.

It is a super-2 number, since 2×21101101131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101101139) 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, 18806125 + ... + 18807246.

It is an arithmetic number, because the mean of its divisors is an integer number (2031122088).

Almost surely, 2^21101101131 is an apocalyptic number.

21101101131 is a deficient number, since it is larger than the sum of its proper divisors (11396852277).

21101101131 is a wasteful number, since it uses less digits than its factorization.

21101101131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37613402.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 21101101131 its reverse (13110110112), we get a palindrome (34211211243).

The spelling of 21101101131 in words is "twenty-one billion, one hundred one million, one hundred one thousand, one hundred thirty-one".