21021111122 has 16 divisors (see below), whose sum is σ = 34456210272. Its totient is φ = 9538931520.

The previous prime is 21021111049. The next prime is 21021111131. The reversal of 21021111122 is 22111112012.

It is a super-2 number, since 2×21021111122² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021111097 and 21021111106.

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, 792608 + ... + 818699.

It is an arithmetic number, because the mean of its divisors is an integer number (2153513142).

Almost surely, 2^21021111122 is an apocalyptic number.

21021111122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021111122 is a deficient number, since it is larger than the sum of its proper divisors (13435099150).

21021111122 is a wasteful number, since it uses less digits than its factorization.

21021111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611913.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21021111122 its reverse (22111112012), we get a palindrome (43132223134).

The spelling of 21021111122 in words is "twenty-one billion, twenty-one million, one hundred eleven thousand, one hundred twenty-two".