122002202021221 has 4 divisors (see below), whose sum is σ = 122306446914444. Its totient is φ = 121697957128000.

The previous prime is 122002202021209. The next prime is 122002202021233. The reversal of 122002202021221 is 122120202200221.

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

It is an interprime number because it is at equal distance from previous prime (122002202021209) and next prime (122002202021233).

It can be written as a sum of positive squares in 2 ways, for example, as 99486939770596 + 22515262250625 = 9974314^2 + 4745025^2 .

It is a cyclic number.

It is not a de Polignac number, because 122002202021221 - 2⁷ = 122002202021093 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 (122002202021201) 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, 152122446010 + ... + 152122446811.

It is an arithmetic number, because the mean of its divisors is an integer number (30576611728611).

Almost surely, 2^{122002202021221} is an apocalyptic number.

It is an amenable number.

122002202021221 is a deficient number, since it is larger than the sum of its proper divisors (304244893223).

122002202021221 is an equidigital number, since it uses as much as digits as its factorization.

122002202021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304244893222.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 122002202021221 its reverse (122120202200221), we get a palindrome (244122404221442).

The spelling of 122002202021221 in words is "one hundred twenty-two trillion, two billion, two hundred two million, twenty-one thousand, two hundred twenty-one".