20202101291 has 8 divisors (see below), whose sum is σ = 21266683200. Its totient is φ = 19137650760.

The previous prime is 20202101237. The next prime is 20202101299. The reversal of 20202101291 is 19210120202.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202101291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202101299) 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, 532256 + ... + 568946.

It is an arithmetic number, because the mean of its divisors is an integer number (2658335400).

Almost surely, 2^20202101291 is an apocalyptic number.

20202101291 is a deficient number, since it is larger than the sum of its proper divisors (1064581909).

20202101291 is a wasteful number, since it uses less digits than its factorization.

20202101291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65689.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20202101291 its reverse (19210120202), we get a palindrome (39412221493).

The spelling of 20202101291 in words is "twenty billion, two hundred two million, one hundred one thousand, two hundred ninety-one".