21021102022 has 8 divisors (see below), whose sum is σ = 31532270616. Its totient is φ = 10510345152.

The previous prime is 21021102013. The next prime is 21021102031. The reversal of 21021102022 is 22020112012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21021102013) and next prime (21021102031).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21021101993 and 21021102011.

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 in 3 ways as a sum of consecutive naturals, for example, 131478 + ... + 243574.

It is an arithmetic number, because the mean of its divisors is an integer number (3941533827).

Almost surely, 2^21021102022 is an apocalyptic number.

21021102022 is a deficient number, since it is larger than the sum of its proper divisors (10511168594).

21021102022 is a wasteful number, since it uses less digits than its factorization.

21021102022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205862.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21021102022 its reverse (22020112012), we get a palindrome (43041214034).

The spelling of 21021102022 in words is "twenty-one billion, twenty-one million, one hundred two thousand, twenty-two".