21223020035 has 48 divisors (see below), whose sum is σ = 30062242368. Its totient is φ = 14088990720.

The previous prime is 21223020001. The next prime is 21223020041. The reversal of 21223020035 is 53002032212.

It is not a de Polignac number, because 21223020035 - 2⁶ = 21223019971 is a prime.

It is a super-2 number, since 2×21223020035² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223019989 and 21223020016.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8059079 + ... + 8061711.

It is an arithmetic number, because the mean of its divisors is an integer number (626296716).

Almost surely, 2^21223020035 is an apocalyptic number.

21223020035 is a deficient number, since it is larger than the sum of its proper divisors (8839222333).

21223020035 is a wasteful number, since it uses less digits than its factorization.

21223020035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864 (or 2823 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 21223020035 its reverse (53002032212), we get a palindrome (74225052247).

The spelling of 21223020035 in words is "twenty-one billion, two hundred twenty-three million, twenty thousand, thirty-five".