7212000121 has 4 divisors (see below), whose sum is σ = 7235190144. Its totient is φ = 7188810100.

The previous prime is 7212000079. The next prime is 7212000137. The reversal of 7212000121 is 1210002127.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1210002127 = 41 ⋅29512247.

It is a cyclic number.

It is not a de Polignac number, because 7212000121 - 2⁹ = 7211999609 is a prime.

It is a super-3 number, since 3×7212000121³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7212000095 and 7212000104.

It is not an unprimeable number, because it can be changed into a prime (7212000421) 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, 11594545 + ... + 11595166.

It is an arithmetic number, because the mean of its divisors is an integer number (1808797536).

Almost surely, 2^7212000121 is an apocalyptic number.

It is an amenable number.

7212000121 is a deficient number, since it is larger than the sum of its proper divisors (23190023).

7212000121 is a wasteful number, since it uses less digits than its factorization.

7212000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23190022.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 7212000121 is about 84923.4956946545. The cubic root of 7212000121 is about 1932.0509505693.

Adding to 7212000121 its reverse (1210002127), we get a palindrome (8422002248).

The spelling of 7212000121 in words is "seven billion, two hundred twelve million, one hundred twenty-one", and thus it is an aban number.