21201110021210 has 16 divisors (see below), whose sum is σ = 43613712043776. Its totient is φ = 7268952007248.

The previous prime is 21201110021209. The next prime is 21201110021269. The reversal of 21201110021210 is 1212001110212.

It is a super-2 number, since 2×21201110021210² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151436500082 + ... + 151436500221.

It is an arithmetic number, because the mean of its divisors is an integer number (2725857002736).

Almost surely, 2^{21201110021210} is an apocalyptic number.

21201110021210 is an abundant number, since it is smaller than the sum of its proper divisors (22412602022566).

21201110021210 is a wasteful number, since it uses less digits than its factorization.

21201110021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302873000317.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21201110021210 its reverse (1212001110212), we get a palindrome (22413111131422).

The spelling of 21201110021210 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, twenty-one thousand, two hundred ten".