21101231202 has 64 divisors (see below), whose sum is σ = 44723750400. Its totient is φ = 6628663296.

The previous prime is 21101231189. The next prime is 21101231209. The reversal of 21101231202 is 20213210112.

It is not an unprimeable number, because it can be changed into a prime (21101231209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1001674 + ... + 1022522.

It is an arithmetic number, because the mean of its divisors is an integer number (698808600).

Almost surely, 2^21101231202 is an apocalyptic number.

21101231202 is an abundant number, since it is smaller than the sum of its proper divisors (23622519198).

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

21101231202 is a wasteful number, since it uses less digits than its factorization.

21101231202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21035.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21101231202 its reverse (20213210112), we get a palindrome (41314441314).

The spelling of 21101231202 in words is "twenty-one billion, one hundred one million, two hundred thirty-one thousand, two hundred two".