1011201001220 has 12 divisors (see below), whose sum is σ = 2123522102604. Its totient is φ = 404480400480.

The previous prime is 1011201001211. The next prime is 1011201001243. The reversal of 1011201001220 is 221001021101.

It can be written as a sum of positive squares in 2 ways, for example, as 126577985284 + 884623015936 = 355778^2 + 940544^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25280025011 + ... + 25280025050.

It is an arithmetic number, because the mean of its divisors is an integer number (176960175217).

Almost surely, 2^{1011201001220} is an apocalyptic number.

1011201001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011201001220 is an abundant number, since it is smaller than the sum of its proper divisors (1112321101384).

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

1011201001220 is a wasteful number, since it uses less digits than its factorization.

1011201001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50560050070 (or 50560050068 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1011201001220 its reverse (221001021101), we get a palindrome (1232202022321).

The spelling of 1011201001220 in words is "one trillion, eleven billion, two hundred one million, one thousand, two hundred twenty".