202001212222121 has 8 divisors (see below), whose sum is σ = 217548653416584. Its totient is φ = 186455040514560.

The previous prime is 202001212222093. The next prime is 202001212222151. The reversal of 202001212222121 is 121222212100202.

It can be written as a sum of positive squares in 4 ways, for example, as 39635385200896 + 162365827021225 = 6295664^2 + 12742285^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202001212222121 - 2³⁴ = 201984032352937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202001212222093 and 202001212222102.

It is not an unprimeable number, because it can be changed into a prime (202001212222151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317041226 + ... + 317677731.

It is an arithmetic number, because the mean of its divisors is an integer number (27193581677073).

Almost surely, 2^{202001212222121} is an apocalyptic number.

It is an amenable number.

202001212222121 is a deficient number, since it is larger than the sum of its proper divisors (15547441194463).

202001212222121 is a wasteful number, since it uses less digits than its factorization.

202001212222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634743451.

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

Adding to 202001212222121 its reverse (121222212100202), we get a palindrome (323223424322323).

The spelling of 202001212222121 in words is "two hundred two trillion, one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".