2121223101 has 4 divisors (see below), whose sum is σ = 2828297472. Its totient is φ = 1414148732.

The previous prime is 2121223087. The next prime is 2121223103. The reversal of 2121223101 is 1013221212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2121223101 - 2⁷ = 2121222973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121223103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353537181 + ... + 353537186.

It is an arithmetic number, because the mean of its divisors is an integer number (707074368).

Almost surely, 2^2121223101 is an apocalyptic number.

It is an amenable number.

2121223101 is a deficient number, since it is larger than the sum of its proper divisors (707074371).

2121223101 is an equidigital number, since it uses as much as digits as its factorization.

2121223101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707074370.

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

The square root of 2121223101 is about 46056.7378458353. The cubic root of 2121223101 is about 1284.8786596300.

Adding to 2121223101 its reverse (1013221212), we get a palindrome (3134444313).

The spelling of 2121223101 in words is "two billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred one".