121220203203 has 96 divisors (see below), whose sum is σ = 199983513600. Its totient is φ = 70083014400.

The previous prime is 121220203201. The next prime is 121220203211. The reversal of 121220203203 is 302302022121.

121220203203 is a `hidden beast` number, since 121 + 220 + 2 + 0 + 320 + 3 = 666.

It is not a de Polignac number, because 121220203203 - 2¹ = 121220203201 is a prime.

It is a super-2 number, since 2×121220203203² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121220203201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 113395353 + ... + 113396421.

It is an arithmetic number, because the mean of its divisors is an integer number (2083161600).

Almost surely, 2^121220203203 is an apocalyptic number.

121220203203 is a deficient number, since it is larger than the sum of its proper divisors (78763310397).

121220203203 is a wasteful number, since it uses less digits than its factorization.

121220203203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 121220203203 its reverse (302302022121), we get a palindrome (423522225324).

It can be divided in two parts, 121220 and 203203, that added together give a palindrome (324423).

The spelling of 121220203203 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred three thousand, two hundred three".