121420134121 has 16 divisors (see below), whose sum is σ = 143604820800. Its totient is φ = 101207171520.

The previous prime is 121420134109. The next prime is 121420134181. The reversal of 121420134121 is 121431024121.

It is not a de Polignac number, because 121420134121 - 2⁹ = 121420133609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121420134092 and 121420134101.

It is not an unprimeable number, because it can be changed into a prime (121420134181) 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, 2827995 + ... + 2870608.

It is an arithmetic number, because the mean of its divisors is an integer number (8975301300).

Almost surely, 2^121420134121 is an apocalyptic number.

121420134121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121420134121 is a deficient number, since it is larger than the sum of its proper divisors (22184686679).

121420134121 is a wasteful number, since it uses less digits than its factorization.

121420134121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5698776.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 121420134121 its reverse (121431024121), we get a palindrome (242851158242).

Subtracting 121420134121 from its reverse (121431024121), we obtain a square (10890000 = 3300²).

The spelling of 121420134121 in words is "one hundred twenty-one billion, four hundred twenty million, one hundred thirty-four thousand, one hundred twenty-one".