1055521220072 has 64 divisors (see below), whose sum is σ = 2173451918400. Its totient is φ = 476577354240.

The previous prime is 1055521220051. The next prime is 1055521220093. The reversal of 1055521220072 is 2700221255501.

It is an interprime number because it is at equal distance from previous prime (1055521220051) and next prime (1055521220093).

It is a super-2 number, since 2×1055521220072² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52532204 + ... + 52552292.

It is an arithmetic number, because the mean of its divisors is an integer number (33960186225).

Almost surely, 2^{1055521220072} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1055521220072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1086725959200).

1055521220072 is an abundant number, since it is smaller than the sum of its proper divisors (1117930698328).

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

1055521220072 is a wasteful number, since it uses less digits than its factorization.

1055521220072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24066 (or 24062 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

Adding to 1055521220072 its reverse (2700221255501), we get a palindrome (3755742475573).

The spelling of 1055521220072 in words is "one trillion, fifty-five billion, five hundred twenty-one million, two hundred twenty thousand, seventy-two".