21000001221022 has 8 divisors (see below), whose sum is σ = 31504978940400. Its totient is φ = 10498341574224.

The previous prime is 21000001220969. The next prime is 21000001221047. The reversal of 21000001221022 is 22012210000012.

It is a happy number.

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 = 21000001220993 and 21000001221011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829502322 + ... + 829527637.

It is an arithmetic number, because the mean of its divisors is an integer number (3938122367550).

Almost surely, 2^{21000001221022} is an apocalyptic number.

21000001221022 is a deficient number, since it is larger than the sum of its proper divisors (10504977719378).

21000001221022 is a wasteful number, since it uses less digits than its factorization.

21000001221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659036290.

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

Adding to 21000001221022 its reverse (22012210000012), we get a palindrome (43012211221034).

The spelling of 21000001221022 in words is "twenty-one trillion, one million, two hundred twenty-one thousand, twenty-two".