1201566103920 has 240 divisors, whose sum is σ = 4966473500352. Its totient is φ = 253517230080.

The previous prime is 1201566103897. The next prime is 1201566103951. The reversal of 1201566103920 is 293016651021.

1201566103920 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 5 + 6 + 610 + 39 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×1201566103920² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9103941 + ... + 9234980.

Almost surely, 2^{1201566103920} is an apocalyptic number.

1201566103920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201566103920 is an abundant number, since it is smaller than the sum of its proper divisors (3764907396432).

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

1201566103920 is a wasteful number, since it uses less digits than its factorization.

1201566103920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18338960 (or 18338951 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 1201566103920 in words is "one trillion, two hundred one billion, five hundred sixty-six million, one hundred three thousand, nine hundred twenty".