1202121121 has 8 divisors (see below), whose sum is σ = 1223651520. Its totient is φ = 1180758672.

The previous prime is 1202121113. The next prime is 1202121191. The reversal of 1202121121 is 1211212021.

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 1202121121 - 2³ = 1202121113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202121191) 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, 27501 + ... + 56218.

It is an arithmetic number, because the mean of its divisors is an integer number (152956440).

Almost surely, 2^1202121121 is an apocalyptic number.

It is an amenable number.

1202121121 is a deficient number, since it is larger than the sum of its proper divisors (21530399).

1202121121 is an equidigital number, since it uses as much as digits as its factorization.

1202121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83975.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1202121121 is about 34671.6183787258. The cubic root of 1202121121 is about 1063.2843193593.

Adding to 1202121121 its reverse (1211212021), we get a palindrome (2413333142).

The spelling of 1202121121 in words is "one billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-one".