21120202011122 has 4 divisors (see below), whose sum is σ = 31680303016686. Its totient is φ = 10560101005560.

The previous prime is 21120202011121. The next prime is 21120202011131. The reversal of 21120202011122 is 22111020202112.

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., 19431707075881 + 1688494935241 = 4408141^2 + 1299421^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21120202011122.

It is not an unprimeable number, because it can be changed into a prime (21120202011121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280050502779 + ... + 5280050502782.

Almost surely, 2^{21120202011122} is an apocalyptic number.

21120202011122 is a deficient number, since it is larger than the sum of its proper divisors (10560101005564).

21120202011122 is a wasteful number, since it uses less digits than its factorization.

21120202011122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560101005563.

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

Adding to 21120202011122 its reverse (22111020202112), we get a palindrome (43231222213234).

The spelling of 21120202011122 in words is "twenty-one trillion, one hundred twenty billion, two hundred two million, eleven thousand, one hundred twenty-two".