21310101202 has 8 divisors (see below), whose sum is σ = 34424009676. Its totient is φ = 9835431312.

The previous prime is 21310101161. The next prime is 21310101203. The reversal of 21310101202 is 20210101312.

It can be written as a sum of positive squares in 2 ways, for example, as 16284567321 + 5025533881 = 127611^2 + 70891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (21310101203) 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 3 ways as a sum of consecutive naturals, for example, 409809613 + ... + 409809664.

Almost surely, 2^21310101202 is an apocalyptic number.

21310101202 is a deficient number, since it is larger than the sum of its proper divisors (13113908474).

21310101202 is a wasteful number, since it uses less digits than its factorization.

21310101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819619292.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21310101202 its reverse (20210101312), we get a palindrome (41520202514).

The spelling of 21310101202 in words is "twenty-one billion, three hundred ten million, one hundred one thousand, two hundred two".