7213929121 has 8 divisors (see below), whose sum is σ = 8510441984. Its totient is φ = 5983904160.

The previous prime is 7213929119. The next prime is 7213929127. The reversal of 7213929121 is 1219293127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7213929121 - 2¹ = 7213929119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7213929127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16621740 + ... + 16622173.

It is an arithmetic number, because the mean of its divisors is an integer number (1063805248).

Almost surely, 2^7213929121 is an apocalyptic number.

It is an amenable number.

7213929121 is a deficient number, since it is larger than the sum of its proper divisors (1296512863).

7213929121 is a wasteful number, since it uses less digits than its factorization.

7213929121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33243951.

The product of its digits is 13608, while the sum is 37.

The square root of 7213929121 is about 84934.8522162722. The cubic root of 7213929121 is about 1932.2231910014.

The spelling of 7213929121 in words is "seven billion, two hundred thirteen million, nine hundred twenty-nine thousand, one hundred twenty-one".