121220210020202 has 4 divisors (see below), whose sum is σ = 181830315030306. Its totient is φ = 60610105010100.

The previous prime is 121220210020199. The next prime is 121220210020237. The reversal of 121220210020202 is 202020012022121.

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., 79165879945441 + 42054330074761 = 8897521^2 + 6484931^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305052505049 + ... + 30305052505052.

Almost surely, 2^{121220210020202} is an apocalyptic number.

121220210020202 is a deficient number, since it is larger than the sum of its proper divisors (60610105010104).

121220210020202 is an equidigital number, since it uses as much as digits as its factorization.

121220210020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610105010103.

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

Adding to 121220210020202 its reverse (202020012022121), we get a palindrome (323240222042323).

The spelling of 121220210020202 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred ten million, twenty thousand, two hundred two".