2112210121 has 10 divisors (see below), whose sum is σ = 2464101322. Its totient is φ = 1810463760.

The previous prime is 2112210103. The next prime is 2112210173. The reversal of 2112210121 is 1210122112.

It can be written as a sum of positive squares in only one way, i.e., 1792336896 + 319873225 = 42336^2 + 17885^2 .

It is not a de Polignac number, because 2112210121 - 2⁹ = 2112209609 is a prime.

It is a super-2 number, since 2×2112210121² = 8922863190509669282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112210421) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 437460 + ... + 442261.

Almost surely, 2^2112210121 is an apocalyptic number.

It is an amenable number.

2112210121 is a deficient number, since it is larger than the sum of its proper divisors (351891201).

2112210121 is an frugal number, since it uses more digits than its factorization.

2112210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879749 (or 879728 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2112210121 is about 45958.7872011436. The cubic root of 2112210121 is about 1283.0562792187.

Adding to 2112210121 its reverse (1210122112), we get a palindrome (3322332233).

The spelling of 2112210121 in words is "two billion, one hundred twelve million, two hundred ten thousand, one hundred twenty-one".