1211195220480 has 1280 divisors, whose sum is σ = 5177085788160. Its totient is φ = 262416236544.

The previous prime is 1211195220479. The next prime is 1211195220527. The reversal of 1211195220480 is 840225911121.

1211195220480 is a `hidden beast` number, since 12 + 1 + 119 + 52 + 2 + 0 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a super-2 number, since 2×1211195220480² (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 an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1413296212 + ... + 1413297068.

It is an arithmetic number, because the mean of its divisors is an integer number (4044598272).

Almost surely, 2^{1211195220480} is an apocalyptic number.

1211195220480 is a gapful number since it is divisible by the number (10) 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 1211195220480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2588542894080).

1211195220480 is an abundant number, since it is smaller than the sum of its proper divisors (3965890567680).

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

1211195220480 is a wasteful number, since it uses less digits than its factorization.

1211195220480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 1211195220480 in words is "one trillion, two hundred eleven billion, one hundred ninety-five million, two hundred twenty thousand, four hundred eighty".