21101101120202 has 4 divisors (see below), whose sum is σ = 31651651680306. Its totient is φ = 10550550560100.

The previous prime is 21101101120189. The next prime is 21101101120259. The reversal of 21101101120202 is 20202110110112.

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., 19361152817161 + 1739948303041 = 4400131^2 + 1319071^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275275280049 + ... + 5275275280052.

Almost surely, 2^{21101101120202} is an apocalyptic number.

21101101120202 is a deficient number, since it is larger than the sum of its proper divisors (10550550560104).

21101101120202 is a wasteful number, since it uses less digits than its factorization.

21101101120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550550560103.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101101120202 its reverse (20202110110112), we get a palindrome (41303211230314).

The spelling of 21101101120202 in words is "twenty-one trillion, one hundred one billion, one hundred one million, one hundred twenty thousand, two hundred two".