121021020203 has 2 divisors, whose sum is σ = 121021020204. Its totient is φ = 121021020202.

The previous prime is 121021020199. The next prime is 121021020229. The reversal of 121021020203 is 302020120121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121021020203 - 2² = 121021020199 is a prime.

It is a super-2 number, since 2×121021020203² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121021010203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510510101 + 60510510102.

It is an arithmetic number, because the mean of its divisors is an integer number (60510510102).

Almost surely, 2^121021020203 is an apocalyptic number.

121021020203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021020203 is an equidigital number, since it uses as much as digits as its factorization.

121021020203 is an evil number, because the sum of its binary digits is even.

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

Adding to 121021020203 its reverse (302020120121), we get a palindrome (423041140324).

The spelling of 121021020203 in words is "one hundred twenty-one billion, twenty-one million, twenty thousand, two hundred three".