121222101002021 has 4 divisors (see below), whose sum is σ = 121300157733132. Its totient is φ = 121144044270912.

The previous prime is 121222101002017. The next prime is 121222101002039. The reversal of 121222101002021 is 120200101222121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63388889817796 + 57833211184225 = 7961714^2 + 7604815^2 .

It is a cyclic number.

It is not a de Polignac number, because 121222101002021 - 2² = 121222101002017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222101002221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39028363226 + ... + 39028366331.

It is an arithmetic number, because the mean of its divisors is an integer number (30325039433283).

Almost surely, 2^{121222101002021} is an apocalyptic number.

It is an amenable number.

121222101002021 is a deficient number, since it is larger than the sum of its proper divisors (78056731111).

121222101002021 is an equidigital number, since it uses as much as digits as its factorization.

121222101002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78056731110.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121222101002021 its reverse (120200101222121), we get a palindrome (241422202224142).

The spelling of 121222101002021 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred one million, two thousand, twenty-one".