121102211220123 has 32 divisors (see below), whose sum is σ = 189549979315200. Its totient is φ = 67321794038400.

The previous prime is 121102211220121. The next prime is 121102211220139. The reversal of 121102211220123 is 321022112201121.

It is not a de Polignac number, because 121102211220123 - 2¹ = 121102211220121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 121102211220123.

It is not an unprimeable number, because it can be changed into a prime (121102211220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4893903 + ... + 16314248.

It is an arithmetic number, because the mean of its divisors is an integer number (5923436853600).

Almost surely, 2^{121102211220123} is an apocalyptic number.

121102211220123 is a deficient number, since it is larger than the sum of its proper divisors (68447768095077).

121102211220123 is a wasteful number, since it uses less digits than its factorization.

121102211220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21215547.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121102211220123 its reverse (321022112201121), we get a palindrome (442124323421244).

The spelling of 121102211220123 in words is "one hundred twenty-one trillion, one hundred two billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty-three".