7298121921 has 8 divisors (see below), whose sum is σ = 9792809664. Its totient is φ = 4834424400.

The previous prime is 7298121899. The next prime is 7298121953. The reversal of 7298121921 is 1291218927.

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

It is not a de Polignac number, because 7298121921 - 2²⁹ = 6761251009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7298122921) 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, 7747005 + ... + 7747946.

It is an arithmetic number, because the mean of its divisors is an integer number (1224101208).

Almost surely, 2^7298121921 is an apocalyptic number.

It is an amenable number.

7298121921 is a deficient number, since it is larger than the sum of its proper divisors (2494687743).

7298121921 is a wasteful number, since it uses less digits than its factorization.

7298121921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15495111.

The product of its digits is 36288, while the sum is 42.

The square root of 7298121921 is about 85429.0461201575. The cubic root of 7298121921 is about 1939.7110421825.

The spelling of 7298121921 in words is "seven billion, two hundred ninety-eight million, one hundred twenty-one thousand, nine hundred twenty-one".