202121121121 has 8 divisors (see below), whose sum is σ = 215427890304. Its totient is φ = 188971828800.

The previous prime is 202121121109. The next prime is 202121121131. The reversal of 202121121121 is 121121121202.

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 202121121121 - 2¹⁹ = 202120596833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202121121095 and 202121121104.

It is not an unprimeable number, because it can be changed into a prime (202121121131) 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, 39366565 + ... + 39371698.

It is an arithmetic number, because the mean of its divisors is an integer number (26928486288).

Almost surely, 2^202121121121 is an apocalyptic number.

It is an amenable number.

202121121121 is a deficient number, since it is larger than the sum of its proper divisors (13306769183).

202121121121 is a wasteful number, since it uses less digits than its factorization.

202121121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78738431.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 202121121121 its reverse (121121121202), we get a palindrome (323242242323).

It can be divided in two parts, 202 and 121121121, that multiplied together give a palindrome (24466466442).

The spelling of 202121121121 in words is "two hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".