121220553772072 has 8 divisors (see below), whose sum is σ = 227288538322650. Its totient is φ = 60610276886032.

The previous prime is 121220553772061. The next prime is 121220553772121. The reversal of 121220553772072 is 270277355022121.

It can be written as a sum of positive squares in only one way, i.e., 79619679156196 + 41600874615876 = 8922986^2 + 6449874^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7576284610747 + ... + 7576284610762.

Almost surely, 2^{121220553772072} is an apocalyptic number.

It is an amenable number.

121220553772072 is a deficient number, since it is larger than the sum of its proper divisors (106067984550578).

121220553772072 is a wasteful number, since it uses less digits than its factorization.

121220553772072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15152569221515 (or 15152569221511 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 121220553772072 in words is "one hundred twenty-one trillion, two hundred twenty billion, five hundred fifty-three million, seven hundred seventy-two thousand, seventy-two".