21011021002022 has 4 divisors (see below), whose sum is σ = 31516531503036. Its totient is φ = 10505510501010.

The previous prime is 21011021001881. The next prime is 21011021002043. The reversal of 21011021002022 is 22020012011012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21011021001988 and 21011021002006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252755250504 + ... + 5252755250507.

It is an arithmetic number, because the mean of its divisors is an integer number (7879132875759).

Almost surely, 2^{21011021002022} is an apocalyptic number.

21011021002022 is a deficient number, since it is larger than the sum of its proper divisors (10505510501014).

21011021002022 is a wasteful number, since it uses less digits than its factorization.

21011021002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505510501013.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21011021002022 its reverse (22020012011012), we get a palindrome (43031033013034).

The spelling of 21011021002022 in words is "twenty-one trillion, eleven billion, twenty-one million, two thousand, twenty-two".