21201001022 has 8 divisors (see below), whose sum is σ = 31802274000. Its totient is φ = 10600243024.

The previous prime is 21201001013. The next prime is 21201001039. The reversal of 21201001022 is 22010010212.

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 = 21201000994 and 21201001012.

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, 122 + ... + 205917.

It is an arithmetic number, because the mean of its divisors is an integer number (3975284250).

Almost surely, 2^21201001022 is an apocalyptic number.

21201001022 is a deficient number, since it is larger than the sum of its proper divisors (10601272978).

21201001022 is a wasteful number, since it uses less digits than its factorization.

21201001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257490.

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

Adding to 21201001022 its reverse (22010010212), we get a palindrome (43211011234).

The spelling of 21201001022 in words is "twenty-one billion, two hundred one million, one thousand, twenty-two".