211011220212220 has 48 divisors (see below), whose sum is σ = 466450333604640. Its totient is φ = 79961378881536.

The previous prime is 211011220212187. The next prime is 211011220212253. The reversal of 211011220212220 is 22212022110112.

It is an interprime number because it is at equal distance from previous prime (211011220212187) and next prime (211011220212253).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

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, 37771164 + ... + 42996316.

It is an arithmetic number, because the mean of its divisors is an integer number (9717715283430).

Almost surely, 2^{211011220212220} is an apocalyptic number.

211011220212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211011220212220 is an abundant number, since it is smaller than the sum of its proper divisors (255439113392420).

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

211011220212220 is a wasteful number, since it uses less digits than its factorization.

211011220212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5331454 (or 5331452 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211011220212220 its reverse (22212022110112), we get a palindrome (233223242322332).

The spelling of 211011220212220 in words is "two hundred eleven trillion, eleven billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty".