21210001022 has 8 divisors (see below), whose sum is σ = 36360001776. Its totient is φ = 9090000432.

The previous prime is 21210000971. The next prime is 21210001031. The reversal of 21210001022 is 22010001212.

It is a happy number.

21210001022 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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 = 21210000994 and 21210001012.

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, 757500023 + ... + 757500050.

It is an arithmetic number, because the mean of its divisors is an integer number (4545000222).

Almost surely, 2^21210001022 is an apocalyptic number.

21210001022 is a deficient number, since it is larger than the sum of its proper divisors (15150000754).

21210001022 is a wasteful number, since it uses less digits than its factorization.

21210001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515000082.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21210001022 its reverse (22010001212), we get a palindrome (43220002234).

The spelling of 21210001022 in words is "twenty-one billion, two hundred ten million, one thousand, twenty-two".