2031202121 has 8 divisors (see below), whose sum is σ = 2202131400. Its totient is φ = 1862370432.

The previous prime is 2031202111. The next prime is 2031202133. The reversal of 2031202121 is 1212021302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 124657225 + 1906544896 = 11165^2 + 43664^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-2031202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2031202096 and 2031202105.

It is not an unprimeable number, because it can be changed into a prime (2031202111) 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, 522380 + ... + 526253.

It is an arithmetic number, because the mean of its divisors is an integer number (275266425).

Almost surely, 2^2031202121 is an apocalyptic number.

It is an amenable number.

2031202121 is a deficient number, since it is larger than the sum of its proper divisors (170929279).

2031202121 is a wasteful number, since it uses less digits than its factorization.

2031202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048795.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2031202121 is about 45068.8597703559. The cubic root of 2031202121 is about 1266.4393041208.

Adding to 2031202121 its reverse (1212021302), we get a palindrome (3243223423).

The spelling of 2031202121 in words is "two billion, thirty-one million, two hundred two thousand, one hundred twenty-one".