21230435215110 has 64 divisors (see below), whose sum is σ = 55644210572544. Its totient is φ = 5141302627200.

The previous prime is 21230435215097. The next prime is 21230435215127. The reversal of 21230435215110 is 1151253403212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33873664 + ... + 34494723.

It is an arithmetic number, because the mean of its divisors is an integer number (869440790196).

Almost surely, 2^{21230435215110} is an apocalyptic number.

21230435215110 is an abundant number, since it is smaller than the sum of its proper divisors (34413775357434).

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

21230435215110 is a wasteful number, since it uses less digits than its factorization.

21230435215110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68369349.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 21230435215110 its reverse (1151253403212), we get a palindrome (22381688618322).

The spelling of 21230435215110 in words is "twenty-one trillion, two hundred thirty billion, four hundred thirty-five million, two hundred fifteen thousand, one hundred ten".