121020021203 has 4 divisors (see below), whose sum is σ = 121903379160. Its totient is φ = 120136663248.

The previous prime is 121020021193. The next prime is 121020021247. The reversal of 121020021203 is 302120020121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302120020121 = 71 ⋅4255211551.

It is a cyclic number.

It is not a de Polignac number, because 121020021203 - 2¹⁸ = 121019759059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020021253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441678773 + ... + 441679046.

It is an arithmetic number, because the mean of its divisors is an integer number (30475844790).

Almost surely, 2^121020021203 is an apocalyptic number.

121020021203 is a deficient number, since it is larger than the sum of its proper divisors (883357957).

121020021203 is an equidigital number, since it uses as much as digits as its factorization.

121020021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883357956.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 121020021203 its reverse (302120020121), we get a palindrome (423140041324).

The spelling of 121020021203 in words is "one hundred twenty-one billion, twenty million, twenty-one thousand, two hundred three".