211621130 has 32 divisors (see below), whose sum is σ = 447106176. Its totient is φ = 70593984.

The previous prime is 211621129. The next prime is 211621237. The reversal of 211621130 is 31126112.

It is a junction number, because it is equal to n+sod(n) for n = 211621099 and 211621108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38264 + ... + 43443.

It is an arithmetic number, because the mean of its divisors is an integer number (13972068).

Almost surely, 2^211621130 is an apocalyptic number.

211621130 is an abundant number, since it is smaller than the sum of its proper divisors (235485046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211621130 is a wasteful number, since it uses less digits than its factorization.

211621130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81758.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 211621130 is about 14547.2035113282. The cubic root of 211621130 is about 595.9177795232.

Adding to 211621130 its reverse (31126112), we get a palindrome (242747242).

The spelling of 211621130 in words is "two hundred eleven million, six hundred twenty-one thousand, one hundred thirty".