202121128492 has 24 divisors (see below), whose sum is σ = 357315416640. Its totient is φ = 100031577600.

The previous prime is 202121128483. The next prime is 202121128529. The reversal of 202121128492 is 294821121202.

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, 1392109 + ... + 1530427.

It is an arithmetic number, because the mean of its divisors is an integer number (14888142360).

Almost surely, 2^202121128492 is an apocalyptic number.

It is an amenable number.

202121128492 is a deficient number, since it is larger than the sum of its proper divisors (155194288148).

202121128492 is a wasteful number, since it uses less digits than its factorization.

202121128492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142041 (or 142039 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

Adding to 202121128492 its reverse (294821121202), we get a palindrome (496942249694).

The spelling of 202121128492 in words is "two hundred two billion, one hundred twenty-one million, one hundred twenty-eight thousand, four hundred ninety-two".