21220123243022 has 64 divisors (see below), whose sum is σ = 37620727119360. Its totient is φ = 8871594076800.

The previous prime is 21220123242977. The next prime is 21220123243031. The reversal of 21220123243022 is 22034232102212.

It is a junction number, because it is equal to n+sod(n) for n = 21220123242982 and 21220123243000.

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, 5641703 + ... + 8617949.

It is an arithmetic number, because the mean of its divisors is an integer number (587823861240).

Almost surely, 2^{21220123243022} is an apocalyptic number.

21220123243022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21220123243022 is a deficient number, since it is larger than the sum of its proper divisors (16400603876338).

21220123243022 is a wasteful number, since it uses less digits than its factorization.

21220123243022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976777.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21220123243022 its reverse (22034232102212), we get a palindrome (43254355345234).

The spelling of 21220123243022 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-three million, two hundred forty-three thousand, twenty-two".