121121023131123 has 16 divisors (see below), whose sum is σ = 162732561040896. Its totient is φ = 80128455469920.

The previous prime is 121121023131107. The next prime is 121121023131149. The reversal of 121121023131123 is 321131320121121.

It is not a de Polignac number, because 121121023131123 - 2⁴ = 121121023131107 is a prime.

It is a super-2 number, since 2×121121023131123² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121121023131093 and 121121023131102.

It is not an unprimeable number, because it can be changed into a prime (121121023131323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7838061 + ... + 17426337.

It is an arithmetic number, because the mean of its divisors is an integer number (10170785065056).

Almost surely, 2^{121121023131123} is an apocalyptic number.

121121023131123 is a deficient number, since it is larger than the sum of its proper divisors (41611537909773).

121121023131123 is a wasteful number, since it uses less digits than its factorization.

121121023131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9620554.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 121121023131123 its reverse (321131320121121), we get a palindrome (442252343252244).

The spelling of 121121023131123 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-three million, one hundred thirty-one thousand, one hundred twenty-three".