21011233231000 has 32 divisors (see below), whose sum is σ = 49166285762880. Its totient is φ = 8404493292000.

The previous prime is 21011233230989. The next prime is 21011233231019. The reversal of 21011233231000 is 13233211012.

It is a super-2 number, since 2×21011233231000² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10505615616 + ... + 10505617615.

It is an arithmetic number, because the mean of its divisors is an integer number (1536446430090).

Almost surely, 2^{21011233231000} is an apocalyptic number.

21011233231000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011233231000 is an abundant number, since it is smaller than the sum of its proper divisors (28155052531880).

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

21011233231000 is a wasteful number, since it uses less digits than its factorization.

21011233231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21011233252 (or 21011233238 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21011233231000 its reverse (13233211012), we get a palindrome (21024466442012).

The spelling of 21011233231000 in words is "twenty-one trillion, eleven billion, two hundred thirty-three million, two hundred thirty-one thousand".