21020000021222 has 8 divisors (see below), whose sum is σ = 31530033747576. Its totient is φ = 10509988772032.

The previous prime is 21020000021221. The next prime is 21020000021249. The reversal of 21020000021222 is 22212000002012.

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 = 21020000021197 and 21020000021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020000021221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3045608 + ... + 7163499.

It is an arithmetic number, because the mean of its divisors is an integer number (3941254218447).

Almost surely, 2^{21020000021222} is an apocalyptic number.

21020000021222 is a deficient number, since it is larger than the sum of its proper divisors (10510033726354).

21020000021222 is a wasteful number, since it uses less digits than its factorization.

21020000021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11238582.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21020000021222 its reverse (22212000002012), we get a palindrome (43232000023234).

The spelling of 21020000021222 in words is "twenty-one trillion, twenty billion, twenty-one thousand, two hundred twenty-two".