211220013 has 8 divisors (see below), whose sum is σ = 289238368. Its totient is φ = 137007504.

The previous prime is 211220011. The next prime is 211220027. The reversal of 211220013 is 310022112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211220013 - 2¹ = 211220011 is a prime.

It is a super-2 number, since 2×211220013² = 89227787783440338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 951331 + ... + 951552.

It is an arithmetic number, because the mean of its divisors is an integer number (36154796).

Almost surely, 2^211220013 is an apocalyptic number.

It is an amenable number.

211220013 is a deficient number, since it is larger than the sum of its proper divisors (78018355).

211220013 is a wasteful number, since it uses less digits than its factorization.

211220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902923.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 211220013 is about 14533.4102329770. The cubic root of 211220013 is about 595.5410308561.

Adding to 211220013 its reverse (310022112), we get a palindrome (521242125).

The spelling of 211220013 in words is "two hundred eleven million, two hundred twenty thousand, thirteen".