121220203 has 16 divisors (see below), whose sum is σ = 136090080. Its totient is φ = 107202816.

The previous prime is 121220201. The next prime is 121220213. The reversal of 121220203 is 302022121.

It is a cyclic number.

It is not a de Polignac number, because 121220203 - 2¹ = 121220201 is a prime.

It is a super-2 number, since 2×121220203² = 29388675230722418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220201) 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, 50476 + ... + 52822.

It is an arithmetic number, because the mean of its divisors is an integer number (8505630).

Almost surely, 2^121220203 is an apocalyptic number.

121220203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121220203 is a deficient number, since it is larger than the sum of its proper divisors (14869877).

121220203 is a wasteful number, since it uses less digits than its factorization.

121220203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 121220203 is about 11010.0046775649. The cubic root of 121220203 is about 494.9086019735.

Adding to 121220203 its reverse (302022121), we get a palindrome (423242324).

The spelling of 121220203 in words is "one hundred twenty-one million, two hundred twenty thousand, two hundred three".