1012220120100 has 144 divisors (see below), whose sum is σ = 3418289215488. Its totient is φ = 226441925760.

The previous prime is 1012220120089. The next prime is 1012220120111. The reversal of 1012220120100 is 10210222101.

It is an interprime number because it is at equal distance from previous prime (1012220120089) and next prime (1012220120111).

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

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, 5029062 + ... + 5226461.

It is an arithmetic number, because the mean of its divisors is an integer number (23738119552).

Almost surely, 2^{1012220120100} is an apocalyptic number.

1012220120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012220120100 is an abundant number, since it is smaller than the sum of its proper divisors (2406069095388).

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

1012220120100 is a wasteful number, since it uses less digits than its factorization.

1012220120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10255594 (or 10255587 counting only the distinct ones).

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

Adding to 1012220120100 its reverse (10210222101), we get a palindrome (1022430342201).

The spelling of 1012220120100 in words is "one trillion, twelve billion, two hundred twenty million, one hundred twenty thousand, one hundred".