2210131221 has 16 divisors (see below), whose sum is σ = 2984615424. Its totient is φ = 1454561264.

The previous prime is 2210131219. The next prime is 2210131237. The reversal of 2210131221 is 1221310122.

It is a cyclic number.

It is not a de Polignac number, because 2210131221 - 2¹ = 2210131219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2210131221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210131241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442480 + ... + 447446.

It is an arithmetic number, because the mean of its divisors is an integer number (186538464).

Almost surely, 2^2210131221 is an apocalyptic number.

It is an amenable number.

2210131221 is a deficient number, since it is larger than the sum of its proper divisors (774484203).

2210131221 is a wasteful number, since it uses less digits than its factorization.

2210131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840.

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

The square root of 2210131221 is about 47012.0327256757. The cubic root of 2210131221 is about 1302.5848414691.

Adding to 2210131221 its reverse (1221310122), we get a palindrome (3431441343).

The spelling of 2210131221 in words is "two billion, two hundred ten million, one hundred thirty-one thousand, two hundred twenty-one".