21123221101022 has 16 divisors (see below), whose sum is σ = 32871871485360. Its totient is φ = 10168029704448.

The previous prime is 21123221101013. The next prime is 21123221101027. The reversal of 21123221101022 is 22010112232112.

It is a super-2 number, since 2×21123221101022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21123221100985 and 21123221101003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123221101027) 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, 524754323 + ... + 524794574.

It is an arithmetic number, because the mean of its divisors is an integer number (2054491967835).

Almost surely, 2^{21123221101022} is an apocalyptic number.

21123221101022 is a deficient number, since it is larger than the sum of its proper divisors (11748650384338).

21123221101022 is a wasteful number, since it uses less digits than its factorization.

21123221101022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049549275.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21123221101022 its reverse (22010112232112), we get a palindrome (43133333333134).

The spelling of 21123221101022 in words is "twenty-one trillion, one hundred twenty-three billion, two hundred twenty-one million, one hundred one thousand, twenty-two".