21123130203000 has 768 divisors, whose sum is σ = 83755928206080. Its totient is φ = 4701888000000.

The previous prime is 21123130202989. The next prime is 21123130203011. The reversal of 21123130203000 is 30203132112.

21123130203000 is a `hidden beast` number, since 21 + 12 + 31 + 302 + 0 + 300 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21123130202989) and next prime (21123130203011).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 388115790 + ... + 388170210.

It is an arithmetic number, because the mean of its divisors is an integer number (109057198185).

Almost surely, 2^{21123130203000} is an apocalyptic number.

21123130203000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21123130203000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41877964103040).

21123130203000 is an abundant number, since it is smaller than the sum of its proper divisors (62632798003080).

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

21123130203000 is a wasteful number, since it uses less digits than its factorization.

21123130203000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54617 (or 54600 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21123130203000 its reverse (30203132112), we get a palindrome (21153333335112).

The spelling of 21123130203000 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred thirty million, two hundred three thousand".