121010210220123 has 48 divisors (see below), whose sum is σ = 200938938310656. Its totient is φ = 68742066156480.

The previous prime is 121010210220047. The next prime is 121010210220143. The reversal of 121010210220123 is 321022012010121.

121010210220123 is a `hidden beast` number, since 1 + 210 + 1 + 0 + 210 + 220 + 1 + 23 = 666.

It is not a de Polignac number, because 121010210220123 - 2⁴⁴ = 103418024175707 is a prime.

It is a super-2 number, since 2×121010210220123² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121010210220096 and 121010210220105.

It is not an unprimeable number, because it can be changed into a prime (121010210220143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15308161 + ... + 21825677.

It is an arithmetic number, because the mean of its divisors is an integer number (4186227881472).

Almost surely, 2^{121010210220123} is an apocalyptic number.

121010210220123 is a deficient number, since it is larger than the sum of its proper divisors (79928728090533).

121010210220123 is a wasteful number, since it uses less digits than its factorization.

121010210220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6519264 (or 6519261 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121010210220123 its reverse (321022012010121), we get a palindrome (442032222230244).

The spelling of 121010210220123 in words is "one hundred twenty-one trillion, ten billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-three".