21112101202 has 16 divisors (see below), whose sum is σ = 33827724792. Its totient is φ = 9847183360.

The previous prime is 21112101169. The next prime is 21112101203. The reversal of 21112101202 is 20210121112.

It can be written as a sum of positive squares in 4 ways, for example, as 16651063521 + 4461037681 = 129039^2 + 66791^2 .

It is not an unprimeable number, because it can be changed into a prime (21112101203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2743699 + ... + 2751382.

Almost surely, 2^21112101202 is an apocalyptic number.

21112101202 is a deficient number, since it is larger than the sum of its proper divisors (12715623590).

21112101202 is a wasteful number, since it uses less digits than its factorization.

21112101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495213.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112101202 its reverse (20210121112), we get a palindrome (41322222314).

The spelling of 21112101202 in words is "twenty-one billion, one hundred twelve million, one hundred one thousand, two hundred two".