2012011211220 has 96 divisors (see below), whose sum is σ = 5968549939968. Its totient is φ = 504676657152.

The previous prime is 2012011211209. The next prime is 2012011211239. The reversal of 2012011211220 is 221121102102.

It is a super-2 number, since 2×2012011211220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2012011211220.

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, 1144297 + ... + 2309423.

It is an arithmetic number, because the mean of its divisors is an integer number (62172395208).

Almost surely, 2^{2012011211220} is an apocalyptic number.

2012011211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2012011211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2984274969984).

2012011211220 is an abundant number, since it is smaller than the sum of its proper divisors (3956538728748).

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

2012011211220 is a wasteful number, since it uses less digits than its factorization.

2012011211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166849 (or 1166847 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2012011211220 its reverse (221121102102), we get a palindrome (2233132313322).

The spelling of 2012011211220 in words is "two trillion, twelve billion, eleven million, two hundred eleven thousand, two hundred twenty".