21210101202 has 32 divisors (see below), whose sum is σ = 43113265344. Its totient is φ = 6955416000.

The previous prime is 21210101201. The next prime is 21210101249. The reversal of 21210101202 is 20210101212.

It is not an unprimeable number, because it can be changed into a prime (21210101201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16324 + ... + 206607.

It is an arithmetic number, because the mean of its divisors is an integer number (1347289542).

Almost surely, 2^21210101202 is an apocalyptic number.

21210101202 is an abundant number, since it is smaller than the sum of its proper divisors (21903164142).

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

21210101202 is a wasteful number, since it uses less digits than its factorization.

21210101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223194.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21210101202 its reverse (20210101212), we get a palindrome (41420202414).

It can be divided in two parts, 2121010 and 1202, that added together give a palindrome (2122212).

The spelling of 21210101202 in words is "twenty-one billion, two hundred ten million, one hundred one thousand, two hundred two".