2021130251242 has 16 divisors (see below), whose sum is σ = 3038913524520. Its totient is φ = 1008161771968.

The previous prime is 2021130251213. The next prime is 2021130251293. The reversal of 2021130251242 is 2421520311202.

It can be written as a sum of positive squares in 4 ways, for example, as 1228925227761 + 792205023481 = 1108569^2 + 890059^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 828588 + ... + 2174584.

Almost surely, 2^{2021130251242} is an apocalyptic number.

2021130251242 is a deficient number, since it is larger than the sum of its proper divisors (1017783273278).

2021130251242 is a wasteful number, since it uses less digits than its factorization.

2021130251242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347785.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 2021130251242 its reverse (2421520311202), we get a palindrome (4442650562444).

The spelling of 2021130251242 in words is "two trillion, twenty-one billion, one hundred thirty million, two hundred fifty-one thousand, two hundred forty-two".