21001031202030 has 64 divisors (see below), whose sum is σ = 58218901486848. Its totient is φ = 4791679132160.

The previous prime is 21001031201957. The next prime is 21001031202031. The reversal of 21001031202030 is 3020213010012.

It is a super-2 number, since 2×21001031202030² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001031202031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1871744052 + ... + 1871755271.

It is an arithmetic number, because the mean of its divisors is an integer number (909670335732).

Almost surely, 2^{21001031202030} is an apocalyptic number.

21001031202030 is an abundant number, since it is smaller than the sum of its proper divisors (37217870284818).

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

21001031202030 is a wasteful number, since it uses less digits than its factorization.

21001031202030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743499361.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21001031202030 its reverse (3020213010012), we get a palindrome (24021244212042).

The spelling of 21001031202030 in words is "twenty-one trillion, one billion, thirty-one million, two hundred two thousand, thirty".