20001211213 has 4 divisors (see below), whose sum is σ = 21053906560. Its totient is φ = 18948515868.

The previous prime is 20001211211. The next prime is 20001211273. The reversal of 20001211213 is 31211210002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20001211213 - 2¹ = 20001211211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001211193 and 20001211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001211211) 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, 526347645 + ... + 526347682.

It is an arithmetic number, because the mean of its divisors is an integer number (5263476640).

Almost surely, 2^20001211213 is an apocalyptic number.

It is an amenable number.

20001211213 is a deficient number, since it is larger than the sum of its proper divisors (1052695347).

20001211213 is a wasteful number, since it uses less digits than its factorization.

20001211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052695346.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20001211213 its reverse (31211210002), we get a palindrome (51212421215).

The spelling of 20001211213 in words is "twenty billion, one million, two hundred eleven thousand, two hundred thirteen".