121210202020202 has 4 divisors (see below), whose sum is σ = 181815303030306. Its totient is φ = 60605101010100.

The previous prime is 121210202020133. The next prime is 121210202020249. The reversal of 121210202020202 is 202020202012121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 62667029895001 + 58543172125201 = 7916251^2 + 7651351^2 .

It is a super-2 number, since 2×121210202020202² (a number of 29 digits) contains 22 as substring.

121210202020202 is a modest number, since divided by 2020202 gives 1212102 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30302550505049 + ... + 30302550505052.

Almost surely, 2^{121210202020202} is an apocalyptic number.

121210202020202 is a deficient number, since it is larger than the sum of its proper divisors (60605101010104).

121210202020202 is an equidigital number, since it uses as much as digits as its factorization.

121210202020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60605101010103.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121210202020202 its reverse (202020202012121), we get a palindrome (323230404032323).

The spelling of 121210202020202 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred two million, twenty thousand, two hundred two".