21111010020022 has 64 divisors (see below), whose sum is σ = 34788851564544. Its totient is φ = 9547878936960.

The previous prime is 21111010019977. The next prime is 21111010020047. The reversal of 21111010020022 is 22002001011112.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 21111010019984 and 21111010020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6665931483 + ... + 6665934649.

It is an arithmetic number, because the mean of its divisors is an integer number (543575805696).

Almost surely, 2^{21111010020022} is an apocalyptic number.

21111010020022 is a deficient number, since it is larger than the sum of its proper divisors (13677841544522).

21111010020022 is a wasteful number, since it uses less digits than its factorization.

21111010020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693.

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

Adding to 21111010020022 its reverse (22002001011112), we get a palindrome (43113011031134).

The spelling of 21111010020022 in words is "twenty-one trillion, one hundred eleven billion, ten million, twenty thousand, twenty-two".