21023121113000 has 32 divisors (see below), whose sum is σ = 49194103406760. Its totient is φ = 8409248444800.

The previous prime is 21023121112991. The next prime is 21023121113003. The reversal of 21023121113000 is 31112132012.

It can be written as a sum of positive squares in 4 ways, for example, as 1450584177604 + 19572536935396 = 1204402^2 + 4424086^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21023121113000.

It is not an unprimeable number, because it can be changed into a prime (21023121113003) 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, 10511559557 + ... + 10511561556.

Almost surely, 2^{21023121113000} is an apocalyptic number.

21023121113000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023121113000 is an abundant number, since it is smaller than the sum of its proper divisors (28170982293760).

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

21023121113000 is a wasteful number, since it uses less digits than its factorization.

21023121113000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21023121134 (or 21023121120 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21023121113000 its reverse (31112132012), we get a palindrome (21054233245012).

The spelling of 21023121113000 in words is "twenty-one trillion, twenty-three billion, one hundred twenty-one million, one hundred thirteen thousand".