121020012220123 has 4 divisors (see below), whose sum is σ = 121020196044960. Its totient is φ = 121019828395288.

The previous prime is 121020012220103. The next prime is 121020012220127. The reversal of 121020012220123 is 321022210020121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121020012220123 - 2¹⁷ = 121020012089051 is a prime.

It is a super-2 number, since 2×121020012220123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121020012220123.

It is not an unprimeable number, because it can be changed into a prime (121020012220127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90921340 + ... + 92242777.

It is an arithmetic number, because the mean of its divisors is an integer number (30255049011240).

Almost surely, 2^{121020012220123} is an apocalyptic number.

121020012220123 is a deficient number, since it is larger than the sum of its proper divisors (183824837).

121020012220123 is an equidigital number, since it uses as much as digits as its factorization.

121020012220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183824836.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121020012220123 its reverse (321022210020121), we get a palindrome (442042222240244).

The spelling of 121020012220123 in words is "one hundred twenty-one trillion, twenty billion, twelve million, two hundred twenty thousand, one hundred twenty-three".