2122122221201 has 4 divisors (see below), whose sum is σ = 2143133332404. Its totient is φ = 2101111110000.

The previous prime is 2122122221179. The next prime is 2122122221221. The reversal of 2122122221201 is 1021222212212.

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 903262060801 + 1218860160400 = 950401^2 + 1104020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122122221201 - 2¹⁸ = 2122121959057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2122122221221) 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, 10505555450 + ... + 10505555651.

It is an arithmetic number, because the mean of its divisors is an integer number (535783333101).

Almost surely, 2^{2122122221201} is an apocalyptic number.

It is an amenable number.

2122122221201 is a deficient number, since it is larger than the sum of its proper divisors (21011111203).

2122122221201 is a wasteful number, since it uses less digits than its factorization.

2122122221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21011111202.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2122122221201 its reverse (1021222212212), we get a palindrome (3143344433413).

The spelling of 2122122221201 in words is "two trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred one".