211220010111220 has 48 divisors (see below), whose sum is σ = 484198228080000. Its totient is φ = 76757691208320.

The previous prime is 211220010111211. The next prime is 211220010111223. The reversal of 211220010111220 is 22111010022112.

It is a super-2 number, since 2×211220010111220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220010111194 and 211220010111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220010111223) 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, 309565920 + ... + 310247479.

It is an arithmetic number, because the mean of its divisors is an integer number (10087463085000).

Almost surely, 2^{211220010111220} is an apocalyptic number.

211220010111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220010111220 is an abundant number, since it is smaller than the sum of its proper divisors (272978217968780).

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

211220010111220 is a wasteful number, since it uses less digits than its factorization.

211220010111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619814968 (or 619814966 counting only the distinct ones).

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

Adding to 211220010111220 its reverse (22111010022112), we get a palindrome (233331020133332).

The spelling of 211220010111220 in words is "two hundred eleven trillion, two hundred twenty billion, ten million, one hundred eleven thousand, two hundred twenty".