97128821420 has 24 divisors (see below), whose sum is σ = 205221884784. Its totient is φ = 38613174336.

The previous prime is 97128821417. The next prime is 97128821423. The reversal of 97128821420 is 2412882179.

It is an interprime number because it is at equal distance from previous prime (97128821417) and next prime (97128821423).

It is not an unprimeable number, because it can be changed into a prime (97128821423) 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, 14893799 + ... + 14900318.

It is an arithmetic number, because the mean of its divisors is an integer number (8550911866).

Almost surely, 2^97128821420 is an apocalyptic number.

It is an amenable number.

97128821420 is an abundant number, since it is smaller than the sum of its proper divisors (108093063364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97128821420 is a wasteful number, since it uses less digits than its factorization.

97128821420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29794289 (or 29794287 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The spelling of 97128821420 in words is "ninety-seven billion, one hundred twenty-eight million, eight hundred twenty-one thousand, four hundred twenty".