20212033231 has 4 divisors (see below), whose sum is σ = 21766805032. Its totient is φ = 18657261432.

The previous prime is 20212033223. The next prime is 20212033321. The reversal of 20212033231 is 13233021202.

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 20212033231 - 2³ = 20212033223 is a prime.

It is a super-2 number, since 2×20212033231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212033199 and 20212033208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212033931) 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, 777385881 + ... + 777385906.

It is an arithmetic number, because the mean of its divisors is an integer number (5441701258).

Almost surely, 2^20212033231 is an apocalyptic number.

20212033231 is a deficient number, since it is larger than the sum of its proper divisors (1554771801).

20212033231 is a wasteful number, since it uses less digits than its factorization.

20212033231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554771800.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20212033231 its reverse (13233021202), we get a palindrome (33445054433).

The spelling of 20212033231 in words is "twenty billion, two hundred twelve million, thirty-three thousand, two hundred thirty-one".