105212220123 has 8 divisors (see below), whose sum is σ = 140284569600. Its totient is φ = 70140675368.

The previous prime is 105212220121. The next prime is 105212220143. The reversal of 105212220123 is 321022212501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105212220123 - 2¹ = 105212220121 is a prime.

It is a super-2 number, since 2×105212220123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105212220123.

It is not an unprimeable number, because it can be changed into a prime (105212220121) 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, 245698 + ... + 520376.

It is an arithmetic number, because the mean of its divisors is an integer number (17535571200).

Almost surely, 2^105212220123 is an apocalyptic number.

105212220123 is a deficient number, since it is larger than the sum of its proper divisors (35072349477).

105212220123 is a wasteful number, since it uses less digits than its factorization.

105212220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402361.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 105212220123 its reverse (321022212501), we get a palindrome (426234432624).

The spelling of 105212220123 in words is "one hundred five billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty-three".