211220210111212 has 96 divisors (see below), whose sum is σ = 415012940556480. Its totient is φ = 93472564469760.

The previous prime is 211220210111203. The next prime is 211220210111329. The reversal of 211220210111212 is 212111012022112.

It is a happy number.

It is a super-2 number, since 2×211220210111212² (a number of 29 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 211220210111212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3395082618 + ... + 3395144830.

It is an arithmetic number, because the mean of its divisors is an integer number (4323051464130).

Almost surely, 2^{211220210111212} is an apocalyptic number.

It is an amenable number.

211220210111212 is a deficient number, since it is larger than the sum of its proper divisors (203792730445268).

211220210111212 is a wasteful number, since it uses less digits than its factorization.

211220210111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81571 (or 81569 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211220210111212 its reverse (212111012022112), we get a palindrome (423331222133324).

The spelling of 211220210111212 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred ten million, one hundred eleven thousand, two hundred twelve".