1020220112100 has 72 divisors (see below), whose sum is σ = 3373527844288. Its totient is φ = 233193168000.

The previous prime is 1020220112077. The next prime is 1020220112101. The reversal of 1020220112100 is 12110220201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1020220112101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242907451 + ... + 242911650.

Almost surely, 2^{1020220112100} is an apocalyptic number.

1020220112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020220112100 is an abundant number, since it is smaller than the sum of its proper divisors (2353307732188).

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

1020220112100 is a wasteful number, since it uses less digits than its factorization.

1020220112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485819125 (or 485819118 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1020220112100 its reverse (12110220201), we get a palindrome (1032330332301).

The spelling of 1020220112100 in words is "one trillion, twenty billion, two hundred twenty million, one hundred twelve thousand, one hundred".