7228356121 has 16 divisors (see below), whose sum is σ = 8438145408. Its totient is φ = 6064156800.

The previous prime is 7228356103. The next prime is 7228356127. The reversal of 7228356121 is 1216538227.

It is a cyclic number.

It is not a de Polignac number, because 7228356121 - 2⁷ = 7228355993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7228356127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12951 + ... + 120931.

It is an arithmetic number, because the mean of its divisors is an integer number (527384088).

Almost surely, 2^7228356121 is an apocalyptic number.

It is an amenable number.

7228356121 is a deficient number, since it is larger than the sum of its proper divisors (1209789287).

7228356121 is a wasteful number, since it uses less digits than its factorization.

7228356121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108192.

The product of its digits is 40320, while the sum is 37.

The square root of 7228356121 is about 85019.7395961667. The cubic root of 7228356121 is about 1933.5104054589.

The spelling of 7228356121 in words is "seven billion, two hundred twenty-eight million, three hundred fifty-six thousand, one hundred twenty-one".