21121101022 has 16 divisors (see below), whose sum is σ = 36946533600. Its totient is φ = 9051900144.

The previous prime is 21121100963. The next prime is 21121101059. The reversal of 21121101022 is 22010112112.

It is a super-2 number, since 2×21121101022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121100993 and 21121101011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15393703 + ... + 15395074.

It is an arithmetic number, because the mean of its divisors is an integer number (2309158350).

Almost surely, 2^21121101022 is an apocalyptic number.

21121101022 is a deficient number, since it is larger than the sum of its proper divisors (15825432578).

21121101022 is an equidigital number, since it uses as much as digits as its factorization.

21121101022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30788800 (or 30788786 counting only the distinct ones).

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

Adding to 21121101022 its reverse (22010112112), we get a palindrome (43131213134).

The spelling of 21121101022 in words is "twenty-one billion, one hundred twenty-one million, one hundred one thousand, twenty-two".