21201121022 has 8 divisors (see below), whose sum is σ = 33672368736. Its totient is φ = 9976998112.

The previous prime is 21201120991. The next prime is 21201121093. The reversal of 21201121022 is 22012110212.

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 = 21201120988 and 21201121006.

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, 311781158 + ... + 311781225.

It is an arithmetic number, because the mean of its divisors is an integer number (4209046092).

Almost surely, 2^21201121022 is an apocalyptic number.

21201121022 is a deficient number, since it is larger than the sum of its proper divisors (12471247714).

21201121022 is a wasteful number, since it uses less digits than its factorization.

21201121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623562402.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21201121022 its reverse (22012110212), we get a palindrome (43213231234).

The spelling of 21201121022 in words is "twenty-one billion, two hundred one million, one hundred twenty-one thousand, twenty-two".