21201120213 has 64 divisors (see below), whose sum is σ = 36604119552. Its totient is φ = 10615173120.

The previous prime is 21201120203. The next prime is 21201120221. The reversal of 21201120213 is 31202110212.

It is not a de Polignac number, because 21201120213 - 2⁴ = 21201120197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201120192 and 21201120201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201120203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 388545 + ... + 439737.

It is an arithmetic number, because the mean of its divisors is an integer number (571939368).

Almost surely, 2^21201120213 is an apocalyptic number.

It is an amenable number.

21201120213 is a deficient number, since it is larger than the sum of its proper divisors (15402999339).

21201120213 is a wasteful number, since it uses less digits than its factorization.

21201120213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51294.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21201120213 its reverse (31202110212), we get a palindrome (52403230425).

The spelling of 21201120213 in words is "twenty-one billion, two hundred one million, one hundred twenty thousand, two hundred thirteen".