201101211111220 has 96 divisors (see below), whose sum is σ = 490831034400000. Its totient is φ = 67779290993664.

The previous prime is 201101211111193. The next prime is 201101211111293. The reversal of 201101211111220 is 22111112101102.

It is a super-2 number, since 2×201101211111220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201101211111194 and 201101211111203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 661911906 + ... + 662215654.

It is an arithmetic number, because the mean of its divisors is an integer number (5112823275000).

Almost surely, 2^{201101211111220} is an apocalyptic number.

201101211111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201101211111220 is an abundant number, since it is smaller than the sum of its proper divisors (289729823288780).

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

201101211111220 is a wasteful number, since it uses less digits than its factorization.

201101211111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383977 (or 383975 counting only the distinct ones).

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

Adding to 201101211111220 its reverse (22111112101102), we get a palindrome (223212323212322).

The spelling of 201101211111220 in words is "two hundred one trillion, one hundred one billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty".