21101011131 has 8 divisors (see below), whose sum is σ = 28520088400. Its totient is φ = 13874637312.

The previous prime is 21101011103. The next prime is 21101011147. The reversal of 21101011131 is 13111010112.

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

It is a de Polignac number, because none of the positive numbers 2^k-21101011131 is a prime.

It is a super-2 number, since 2×21101011131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101011171) 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, 48175606 + ... + 48176043.

It is an arithmetic number, because the mean of its divisors is an integer number (3565011050).

Almost surely, 2^21101011131 is an apocalyptic number.

21101011131 is a deficient number, since it is larger than the sum of its proper divisors (7419077269).

21101011131 is an equidigital number, since it uses as much as digits as its factorization.

21101011131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96351725.

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

Adding to 21101011131 its reverse (13111010112), we get a palindrome (34212021243).

The spelling of 21101011131 in words is "twenty-one billion, one hundred one million, eleven thousand, one hundred thirty-one".