21021310032030 has 384 divisors, whose sum is σ = 70093670879232. Its totient is φ = 4243829760000.

The previous prime is 21021310031903. The next prime is 21021310032091. The reversal of 21021310032030 is 3023001312012.

21021310032030 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 1 + 310 + 0 + 320 + 30 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21021310031994 and 21021310032012.

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, 68321835 + ... + 68628825.

It is an arithmetic number, because the mean of its divisors is an integer number (182535601248).

Almost surely, 2^{21021310032030} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21021310032030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35046835439616).

21021310032030 is an abundant number, since it is smaller than the sum of its proper divisors (49072360847202).

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

21021310032030 is a wasteful number, since it uses less digits than its factorization.

21021310032030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307304 (or 307301 counting only the distinct ones).

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

Adding to 21021310032030 its reverse (3023001312012), we get a palindrome (24044311344042).

The spelling of 21021310032030 in words is "twenty-one trillion, twenty-one billion, three hundred ten million, thirty-two thousand, thirty".