121001221220202 has 48 divisors (see below), whose sum is σ = 277632640738440. Its totient is φ = 37955478030336.

The previous prime is 121001221220179. The next prime is 121001221220261. The reversal of 121001221220202 is 202022122100121.

It is a happy number.

121001221220202 is a `hidden beast` number, since 1 + 21 + 0 + 0 + 1 + 221 + 220 + 202 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 103903996875561 + 17097224344641 = 10193331^2 + 4134879^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27587077 + ... + 31670952.

Almost surely, 2^{121001221220202} is an apocalyptic number.

121001221220202 is an abundant number, since it is smaller than the sum of its proper divisors (156631419518238).

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

121001221220202 is a wasteful number, since it uses less digits than its factorization.

121001221220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59264727 (or 59264724 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121001221220202 its reverse (202022122100121), we get a palindrome (323023343320323).

The spelling of 121001221220202 in words is "one hundred twenty-one trillion, one billion, two hundred twenty-one million, two hundred twenty thousand, two hundred two".