2111021211220 has 48 divisors (see below), whose sum is σ = 4536578204928. Its totient is φ = 824709755520.

The previous prime is 2111021211199. The next prime is 2111021211227. The reversal of 2111021211220 is 221121201112.

It is a junction number, because it is equal to n+sod(n) for n = 2111021211194 and 2111021211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111021211227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12490117 + ... + 12658003.

It is an arithmetic number, because the mean of its divisors is an integer number (94512045936).

Almost surely, 2^{2111021211220} is an apocalyptic number.

2111021211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111021211220 is an abundant number, since it is smaller than the sum of its proper divisors (2425556993708).

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

2111021211220 is a wasteful number, since it uses less digits than its factorization.

2111021211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182560 (or 182558 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111021211220 its reverse (221121201112), we get a palindrome (2332142412332).

The spelling of 2111021211220 in words is "two trillion, one hundred eleven billion, twenty-one million, two hundred eleven thousand, two hundred twenty".