2011002101220 has 48 divisors (see below), whose sum is σ = 6435206725248. Its totient is φ = 459657623040.

The previous prime is 2011002101209. The next prime is 2011002101231. The reversal of 2011002101220 is 221012001102.

It is an interprime number because it is at equal distance from previous prime (2011002101209) and next prime (2011002101231).

It is a super-2 number, since 2×2011002101220² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 2011002101196 and 2011002101205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2394049701 + ... + 2394050540.

It is an arithmetic number, because the mean of its divisors is an integer number (134066806776).

Almost surely, 2^{2011002101220} is an apocalyptic number.

2011002101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011002101220 is an abundant number, since it is smaller than the sum of its proper divisors (4424204624028).

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

2011002101220 is a wasteful number, since it uses less digits than its factorization.

2011002101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788100260 (or 4788100258 counting only the distinct ones).

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

Adding to 2011002101220 its reverse (221012001102), we get a palindrome (2232014102322).

The spelling of 2011002101220 in words is "two trillion, eleven billion, two million, one hundred one thousand, two hundred twenty".