20211003131 has 4 divisors (see below), whose sum is σ = 22048367064. Its totient is φ = 18373639200.

The previous prime is 20211003101. The next prime is 20211003143. The reversal of 20211003131 is 13130011202.

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 20211003131 - 2³⁴ = 3031133947 is a prime.

It is a super-2 number, since 2×20211003131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211003101) 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, 918681950 + ... + 918681971.

It is an arithmetic number, because the mean of its divisors is an integer number (5512091766).

Almost surely, 2^20211003131 is an apocalyptic number.

20211003131 is a deficient number, since it is larger than the sum of its proper divisors (1837363933).

20211003131 is a wasteful number, since it uses less digits than its factorization.

20211003131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837363932.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20211003131 its reverse (13130011202), we get a palindrome (33341014333).

The spelling of 20211003131 in words is "twenty billion, two hundred eleven million, three thousand, one hundred thirty-one".