211220210002120 has 32 divisors (see below), whose sum is σ = 518449606369920. Its totient is φ = 76807349091520.

The previous prime is 211220210002091. The next prime is 211220210002127. The reversal of 211220210002120 is 21200012022112.

It is a happy number.

It is a super-2 number, since 2×211220210002120² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220210002094 and 211220210002103.

It is not an unprimeable number, because it can be changed into a prime (211220210002127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240022965472 + ... + 240022966351.

It is an arithmetic number, because the mean of its divisors is an integer number (16201550199060).

Almost surely, 2^{211220210002120} is an apocalyptic number.

211220210002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220210002120 is an abundant number, since it is smaller than the sum of its proper divisors (307229396367800).

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

211220210002120 is a wasteful number, since it uses less digits than its factorization.

211220210002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480045931845 (or 480045931841 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211220210002120 its reverse (21200012022112), we get a palindrome (232420222024232).

The spelling of 211220210002120 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred ten million, two thousand, one hundred twenty".