21120210112202 has 4 divisors (see below), whose sum is σ = 31680315168306. Its totient is φ = 10560105056100.

The previous prime is 21120210112201. The next prime is 21120210112249. The reversal of 21120210112202 is 20221101202112.

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., 13607902054321 + 7512308057881 = 3688889^2 + 2740859^2 .

It is not an unprimeable number, because it can be changed into a prime (21120210112201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280052528049 + ... + 5280052528052.

Almost surely, 2^{21120210112202} is an apocalyptic number.

21120210112202 is a deficient number, since it is larger than the sum of its proper divisors (10560105056104).

21120210112202 is a wasteful number, since it uses less digits than its factorization.

21120210112202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560105056103.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21120210112202 its reverse (20221101202112), we get a palindrome (41341311314314).

The spelling of 21120210112202 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, one hundred twelve thousand, two hundred two".