21001222233030 has 64 divisors (see below), whose sum is σ = 54283471619328. Its totient is φ = 5169208813440.

The previous prime is 21001222233011. The next prime is 21001222233037. The reversal of 21001222233030 is 3033222210012.

It is a happy number.

It is a super-2 number, since 2×21001222233030² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21001222232988 and 21001222233006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001222233037) 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, 4602217 + ... + 7948763.

It is an arithmetic number, because the mean of its divisors is an integer number (848179244052).

Almost surely, 2^{21001222233030} is an apocalyptic number.

21001222233030 is an abundant number, since it is smaller than the sum of its proper divisors (33282249386298).

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

21001222233030 is a wasteful number, since it uses less digits than its factorization.

21001222233030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362661.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21001222233030 its reverse (3033222210012), we get a palindrome (24034444443042).

The spelling of 21001222233030 in words is "twenty-one trillion, one billion, two hundred twenty-two million, two hundred thirty-three thousand, thirty".