2210900121 has 6 divisors (see below), whose sum is σ = 3193522410. Its totient is φ = 1473933408.

The previous prime is 2210900101. The next prime is 2210900123. The reversal of 2210900121 is 1210090122.

It can be written as a sum of positive squares in only one way, i.e., 2082644496 + 128255625 = 45636^2 + 11325^2 .

It is not a de Polignac number, because 2210900121 - 2¹¹ = 2210898073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2210900094 and 2210900103.

It is not an unprimeable number, because it can be changed into a prime (2210900123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122827776 + ... + 122827793.

It is an arithmetic number, because the mean of its divisors is an integer number (532253735).

Almost surely, 2^2210900121 is an apocalyptic number.

It is an amenable number.

2210900121 is a deficient number, since it is larger than the sum of its proper divisors (982622289).

2210900121 is a wasteful number, since it uses less digits than its factorization.

2210900121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245655575 (or 245655572 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 2210900121 is about 47020.2097081670. The cubic root of 2210900121 is about 1302.7358794635.

Adding to 2210900121 its reverse (1210090122), we get a palindrome (3420990243).

The spelling of 2210900121 in words is "two billion, two hundred ten million, nine hundred thousand, one hundred twenty-one".