201011001220 has 24 divisors (see below), whose sum is σ = 444340108800. Its totient is φ = 76172589792.

The previous prime is 201011001137. The next prime is 201011001241. The reversal of 201011001220 is 22100110102.

201011001220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×201011001220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 201011001197 and 201011001206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264487780 + ... + 264488539.

It is an arithmetic number, because the mean of its divisors is an integer number (18514171200).

Almost surely, 2^201011001220 is an apocalyptic number.

201011001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201011001220 is an abundant number, since it is smaller than the sum of its proper divisors (243329107580).

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

201011001220 is a wasteful number, since it uses less digits than its factorization.

201011001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528976347 (or 528976345 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201011001220 its reverse (22100110102), we get a palindrome (223111111322).

The spelling of 201011001220 in words is "two hundred one billion, eleven million, one thousand, two hundred twenty".