121220195080608 has 864 divisors, whose sum is σ = 408390067717632. Its totient is φ = 33938251776000.

The previous prime is 121220195080513. The next prime is 121220195080687. The reversal of 121220195080608 is 806080591022121.

121220195080608 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 20 + 19 + 5 + 0 + 8 + 0 + 608 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 37218357316 + ... + 37218360572.

It is an arithmetic number, because the mean of its divisors is an integer number (472673689488).

Almost surely, 2^{121220195080608} is an apocalyptic number.

121220195080608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121220195080608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204195033858816).

121220195080608 is an abundant number, since it is smaller than the sum of its proper divisors (287169872637024).

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

121220195080608 is a wasteful number, since it uses less digits than its factorization.

121220195080608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798 (or 4774 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 121220195080608 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred ninety-five million, eighty thousand, six hundred eight".