212111220102 has 32 divisors (see below), whose sum is σ = 434734340352. Its totient is φ = 68972248224.

The previous prime is 212111220077. The next prime is 212111220109. The reversal of 212111220102 is 201022111212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111220109) 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 15 ways as a sum of consecutive naturals, for example, 2519953 + ... + 2602764.

It is an arithmetic number, because the mean of its divisors is an integer number (13585448136).

Almost surely, 2^212111220102 is an apocalyptic number.

212111220102 is an abundant number, since it is smaller than the sum of its proper divisors (222623120250).

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

212111220102 is a wasteful number, since it uses less digits than its factorization.

212111220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122892.

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

Adding to 212111220102 its reverse (201022111212), we get a palindrome (413133331314).

The spelling of 212111220102 in words is "two hundred twelve billion, one hundred eleven million, two hundred twenty thousand, one hundred two".