21220120022 has 16 divisors (see below), whose sum is σ = 33239607552. Its totient is φ = 10140959400.

The previous prime is 21220119971. The next prime is 21220120027. The reversal of 21220120022 is 22002102212.

It is a junction number, because it is equal to n+sod(n) for n = 21220119979 and 21220120006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220120027) 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, 116354 + ... + 236597.

It is an arithmetic number, because the mean of its divisors is an integer number (2077475472).

Almost surely, 2^21220120022 is an apocalyptic number.

21220120022 is a deficient number, since it is larger than the sum of its proper divisors (12019487530).

21220120022 is a wasteful number, since it uses less digits than its factorization.

21220120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354283.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21220120022 its reverse (22002102212), we get a palindrome (43222222234).

The spelling of 21220120022 in words is "twenty-one billion, two hundred twenty million, one hundred twenty thousand, twenty-two".