1020200101056 has 140 divisors (see below), whose sum is σ = 3044491599600. Its totient is φ = 337784117760.

The previous prime is 1020200101043. The next prime is 1020200101057. The reversal of 1020200101056 is 6501010020201.

It is a super-2 number, since 2×1020200101056² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1020200101057) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 112021 + ... + 1432811.

Almost surely, 2^{1020200101056} is an apocalyptic number.

1020200101056 is a gapful number since it is divisible by the number (16) 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 1020200101056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1522245799800).

1020200101056 is an abundant number, since it is smaller than the sum of its proper divisors (2024291498544).

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

1020200101056 is a wasteful number, since it uses less digits than its factorization.

1020200101056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320964 (or 1320945 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 1020200101056 its reverse (6501010020201), we get a palindrome (7521210121257).

The spelling of 1020200101056 in words is "one trillion, twenty billion, two hundred million, one hundred one thousand, fifty-six".