1211010220212 has 72 divisors (see below), whose sum is σ = 3060136013760. Its totient is φ = 372574126080.

The previous prime is 1211010220177. The next prime is 1211010220213. The reversal of 1211010220212 is 2120220101121.

It is a junction number, because it is equal to n+sod(n) for n = 1211010220191 and 1211010220200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211010220213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19679412 + ... + 19740852.

It is an arithmetic number, because the mean of its divisors is an integer number (42501889080).

Almost surely, 2^{1211010220212} is an apocalyptic number.

1211010220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211010220212 is an abundant number, since it is smaller than the sum of its proper divisors (1849125793548).

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

1211010220212 is a wasteful number, since it uses less digits than its factorization.

1211010220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71193 (or 71178 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211010220212 its reverse (2120220101121), we get a palindrome (3331230321333).

The spelling of 1211010220212 in words is "one trillion, two hundred eleven billion, ten million, two hundred twenty thousand, two hundred twelve".