21022101121 has 8 divisors (see below), whose sum is σ = 24139123904. Its totient is φ = 17933544720.

The previous prime is 21022101103. The next prime is 21022101127. The reversal of 21022101121 is 12110122012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21022101121 - 2¹⁹ = 21021576833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022101127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7115010 + ... + 7117963.

It is an arithmetic number, because the mean of its divisors is an integer number (3017390488).

Almost surely, 2^21022101121 is an apocalyptic number.

It is an amenable number.

21022101121 is a deficient number, since it is larger than the sum of its proper divisors (3117022783).

21022101121 is a wasteful number, since it uses less digits than its factorization.

21022101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14233191.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21022101121 its reverse (12110122012), we get a palindrome (33132223133).

The spelling of 21022101121 in words is "twenty-one billion, twenty-two million, one hundred one thousand, one hundred twenty-one".