21000112202 has 4 divisors (see below), whose sum is σ = 31500168306. Its totient is φ = 10500056100.

The previous prime is 21000112183. The next prime is 21000112207. The reversal of 21000112202 is 20221100012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14660608561 + 6339503641 = 121081^2 + 79621^2 .

It is not an unprimeable number, because it can be changed into a prime (21000112207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250028049 + ... + 5250028052.

Almost surely, 2^21000112202 is an apocalyptic number.

21000112202 is a deficient number, since it is larger than the sum of its proper divisors (10500056104).

21000112202 is a wasteful number, since it uses less digits than its factorization.

21000112202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500056103.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000112202 its reverse (20221100012), we get a palindrome (41221212214).

The spelling of 21000112202 in words is "twenty-one billion, one hundred twelve thousand, two hundred two".