21011001130 has 64 divisors (see below), whose sum is σ = 44645621760. Its totient is φ = 6966907200.

The previous prime is 21011001127. The next prime is 21011001197. The reversal of 21011001130 is 3110011012.

It is a super-2 number, since 2×21011001130² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6445441 + ... + 6448699.

It is an arithmetic number, because the mean of its divisors is an integer number (697587840).

Almost surely, 2^21011001130 is an apocalyptic number.

21011001130 is an abundant number, since it is smaller than the sum of its proper divisors (23634620630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011001130 is a wasteful number, since it uses less digits than its factorization.

21011001130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6275.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 21011001130 its reverse (3110011012), we get a palindrome (24121012142).

The spelling of 21011001130 in words is "twenty-one billion, eleven million, one thousand, one hundred thirty".