21111012022 has 16 divisors (see below), whose sum is σ = 31711402800. Its totient is φ = 10540558080.

The previous prime is 21111012019. The next prime is 21111012049. The reversal of 21111012022 is 22021011112.

It is a junction number, because it is equal to n+sod(n) for n = 21111011993 and 21111012011.

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, 6762622 + ... + 6765742.

It is an arithmetic number, because the mean of its divisors is an integer number (1981962675).

Almost surely, 2^21111012022 is an apocalyptic number.

21111012022 is a deficient number, since it is larger than the sum of its proper divisors (10600390778).

21111012022 is a wasteful number, since it uses less digits than its factorization.

21111012022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831.

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

Adding to 21111012022 its reverse (22021011112), we get a palindrome (43132023134).

The spelling of 21111012022 in words is "twenty-one billion, one hundred eleven million, twelve thousand, twenty-two".