121011211013121 has 72 divisors (see below), whose sum is σ = 206913093266880. Its totient is φ = 67696932029760.

The previous prime is 121011211013083. The next prime is 121011211013201. The reversal of 121011211013121 is 121310112110121.

It is not a de Polignac number, because 121011211013121 - 2⁶ = 121011211013057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121011211013094 and 121011211013103.

It is not an unprimeable number, because it can be changed into a prime (121011211013921) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 797798530 + ... + 797950196.

It is an arithmetic number, because the mean of its divisors is an integer number (2873792962040).

Almost surely, 2^{121011211013121} is an apocalyptic number.

121011211013121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121011211013121 is a deficient number, since it is larger than the sum of its proper divisors (85901882253759).

121011211013121 is a wasteful number, since it uses less digits than its factorization.

121011211013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208067 (or 208053 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 121011211013121 its reverse (121310112110121), we get a palindrome (242321323123242).

The spelling of 121011211013121 in words is "one hundred twenty-one trillion, eleven billion, two hundred eleven million, thirteen thousand, one hundred twenty-one".