121020202 has 4 divisors (see below), whose sum is σ = 181530306. Its totient is φ = 60510100.

The previous prime is 121020191. The next prime is 121020209. The reversal of 121020202 is 202020121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 202020121 = 89 ⋅2269889.

It can be written as a sum of positive squares in only one way, i.e., 74494161 + 46526041 = 8631^2 + 6821^2 .

It is not an unprimeable number, because it can be changed into a prime (121020209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30255049 + ... + 30255052.

Almost surely, 2^121020202 is an apocalyptic number.

121020202 is a deficient number, since it is larger than the sum of its proper divisors (60510104).

121020202 is an equidigital number, since it uses as much as digits as its factorization.

121020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60510103.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 121020202 is about 11000.9182344021. The cubic root of 121020202 is about 494.6362692004.

Adding to 121020202 its reverse (202020121), we get a palindrome (323040323).

It can be divided in two parts, 1210 and 20202, that added together give a palindrome (21412).

The spelling of 121020202 in words is "one hundred twenty-one million, twenty thousand, two hundred two".