121202020202 has 16 divisors (see below), whose sum is σ = 183771375912. Its totient is φ = 59945995200.

The previous prime is 121202020141. The next prime is 121202020237. The reversal of 121202020202 is 202020202121.

It can be written as a sum of positive squares in 4 ways, for example, as 94512590041 + 26689430161 = 307429^2 + 163369^2 .

It is a super-2 number, since 2×121202020202² (a number of 23 digits) contains 22 as substring.

121202020202 is a modest number, since divided by 2020202 gives 1212 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53693 + ... + 495264.

Almost surely, 2^121202020202 is an apocalyptic number.

121202020202 is a deficient number, since it is larger than the sum of its proper divisors (62569355710).

121202020202 is a wasteful number, since it uses less digits than its factorization.

121202020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550153.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 121202020202 its reverse (202020202121), we get a palindrome (323222222323).

It can be divided in two parts, 121 and 202020202, that multiplied together give a palindrome (24444444442).

The spelling of 121202020202 in words is "one hundred twenty-one billion, two hundred two million, twenty thousand, two hundred two".