121201020421420 has 24 divisors (see below), whose sum is σ = 265588323011424. Its totient is φ = 46372564334976.

The previous prime is 121201020421343. The next prime is 121201020421499. The reversal of 121201020421420 is 24124020102121.

121201020421420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 121201020421391 and 121201020421400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131740239129 + ... + 131740240048.

It is an arithmetic number, because the mean of its divisors is an integer number (11066180125476).

Almost surely, 2^{121201020421420} is an apocalyptic number.

121201020421420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201020421420 is an abundant number, since it is smaller than the sum of its proper divisors (144387302590004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121201020421420 is a wasteful number, since it uses less digits than its factorization.

121201020421420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263480479209 (or 263480479207 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 121201020421420 its reverse (24124020102121), we get a palindrome (145325040523541).

The spelling of 121201020421420 in words is "one hundred twenty-one trillion, two hundred one billion, twenty million, four hundred twenty-one thousand, four hundred twenty".