2321210121 has 32 divisors (see below), whose sum is σ = 3224309760. Its totient is φ = 1484265600.

The previous prime is 2321210119. The next prime is 2321210123. The reversal of 2321210121 is 1210121232.

2321210121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (2321210119) and next prime (2321210123).

It is not a de Polignac number, because 2321210121 - 2¹ = 2321210119 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2321210121.

It is not an unprimeable number, because it can be changed into a prime (2321210123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2766220 + ... + 2767058.

It is an arithmetic number, because the mean of its divisors is an integer number (100759680).

Almost surely, 2^2321210121 is an apocalyptic number.

It is an amenable number.

2321210121 is a deficient number, since it is larger than the sum of its proper divisors (903099639).

2321210121 is a wasteful number, since it uses less digits than its factorization.

2321210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237.

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

The square root of 2321210121 is about 48178.9385624050. The cubic root of 2321210121 is about 1324.0513196870.

Adding to 2321210121 its reverse (1210121232), we get a palindrome (3531331353).

Subtracting from 2321210121 its reverse (1210121232), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 23212 and 10121, that added together give a palindrome (33333).

The spelling of 2321210121 in words is "two billion, three hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".