121221110120202 has 24 divisors (see below), whose sum is σ = 263772973532484. Its totient is φ = 40233615946944.

The previous prime is 121221110120189. The next prime is 121221110120207. The reversal of 121221110120202 is 202021011122121.

121221110120202 is a `hidden beast` number, since 1 + 212 + 21 + 110 + 120 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 117720959305041 + 3500150815161 = 10849929^2 + 1870869^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121221110120207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14451725673 + ... + 14451734060.

Almost surely, 2^{121221110120202} is an apocalyptic number.

121221110120202 is an abundant number, since it is smaller than the sum of its proper divisors (142551863412282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221110120202 is a wasteful number, since it uses less digits than its factorization.

121221110120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28903459974 (or 28903459971 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121221110120202 its reverse (202021011122121), we get a palindrome (323242121242323).

The spelling of 121221110120202 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred twenty thousand, two hundred two".