21201102121210 has 48 divisors (see below), whose sum is σ = 42060940282368. Its totient is φ = 7688484730080.

The previous prime is 21201102121183. The next prime is 21201102121219. The reversal of 21201102121210 is 1212120110212.

It is not an unprimeable number, because it can be changed into a prime (21201102121219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23427282 + ... + 24315421.

It is an arithmetic number, because the mean of its divisors is an integer number (876269589216).

Almost surely, 2^{21201102121210} is an apocalyptic number.

21201102121210 is a deficient number, since it is larger than the sum of its proper divisors (20859838161158).

21201102121210 is a wasteful number, since it uses less digits than its factorization.

21201102121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47743099 (or 47743088 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21201102121210 its reverse (1212120110212), we get a palindrome (22413222231422).

It can be divided in two parts, 21201102 and 121210, that added together give a palindrome (21322312).

The spelling of 21201102121210 in words is "twenty-one trillion, two hundred one billion, one hundred two million, one hundred twenty-one thousand, two hundred ten".