20202121101131 has 4 divisors (see below), whose sum is σ = 20478862486152. Its totient is φ = 19925379716112.

The previous prime is 20202121101121. The next prime is 20202121101137. The reversal of 20202121101131 is 13110112120202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20202121101131 - 2²² = 20202116906827 is a prime.

It is a super-2 number, since 2×20202121101131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20202121101137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138370692401 + ... + 138370692546.

It is an arithmetic number, because the mean of its divisors is an integer number (5119715621538).

Almost surely, 2^{20202121101131} is an apocalyptic number.

20202121101131 is a deficient number, since it is larger than the sum of its proper divisors (276741385021).

20202121101131 is an equidigital number, since it uses as much as digits as its factorization.

20202121101131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276741385020.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20202121101131 its reverse (13110112120202), we get a palindrome (33312233221333).

The spelling of 20202121101131 in words is "twenty trillion, two hundred two billion, one hundred twenty-one million, one hundred one thousand, one hundred thirty-one".