21010101202 has 32 divisors (see below), whose sum is σ = 33851260800. Its totient is φ = 9745148160.

The previous prime is 21010101191. The next prime is 21010101209. The reversal of 21010101202 is 20210101012.

It is not an unprimeable number, because it can be changed into a prime (21010101209) 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, 709452 + ... + 738472.

It is an arithmetic number, because the mean of its divisors is an integer number (1057851900).

Almost surely, 2^21010101202 is an apocalyptic number.

21010101202 is a deficient number, since it is larger than the sum of its proper divisors (12841159598).

21010101202 is a wasteful number, since it uses less digits than its factorization.

21010101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29346.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21010101202 its reverse (20210101012), we get a palindrome (41220202214).

The spelling of 21010101202 in words is "twenty-one billion, ten million, one hundred one thousand, two hundred two".