1220000101020 has 72 divisors (see below), whose sum is σ = 3707937717120. Its totient is φ = 324694174080.

The previous prime is 1220000100983. The next prime is 1220000101049. The reversal of 1220000101020 is 201010000221.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1220000100993 and 1220000101011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6566316 + ... + 6749555.

It is an arithmetic number, because the mean of its divisors is an integer number (51499134960).

Almost surely, 2^{1220000101020} is an apocalyptic number.

1220000101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220000101020 is an abundant number, since it is smaller than the sum of its proper divisors (2487937616100).

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

1220000101020 is a wasteful number, since it uses less digits than its factorization.

1220000101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13316395 (or 13316390 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1220000101020 its reverse (201010000221), we get a palindrome (1421010101241).

The spelling of 1220000101020 in words is "one trillion, two hundred twenty billion, one hundred one thousand, twenty".