211212021002220 has 288 divisors, whose sum is σ = 766179423854208. Its totient is φ = 46085979303936.

The previous prime is 211212021002189. The next prime is 211212021002221. The reversal of 211212021002220 is 22200120212112.

It is a happy number.

211212021002220 is a `hidden beast` number, since 2 + 112 + 120 + 210 + 0 + 2 + 220 = 666.

It is a super-2 number, since 2×211212021002220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211212021002193 and 211212021002202.

It is not an unprimeable number, because it can be changed into a prime (211212021002221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 40269729 + ... + 45211448.

It is an arithmetic number, because the mean of its divisors is an integer number (2660345221716).

Almost surely, 2^{211212021002220} is an apocalyptic number.

211212021002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211212021002220 is an abundant number, since it is smaller than the sum of its proper divisors (554967402851988).

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

211212021002220 is a wasteful number, since it uses less digits than its factorization.

211212021002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85481289 (or 85481284 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211212021002220 its reverse (22200120212112), we get a palindrome (233412141214332).

The spelling of 211212021002220 in words is "two hundred eleven trillion, two hundred twelve billion, twenty-one million, two thousand, two hundred twenty".