212111220001 has 8 divisors (see below), whose sum is σ = 213427061120. Its totient is φ = 210798767088.

The previous prime is 212111219981. The next prime is 212111220019. The reversal of 212111220001 is 100022111212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212111220001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212111220301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721401 + ... + 971926.

It is an arithmetic number, because the mean of its divisors is an integer number (26678382640).

Almost surely, 2^212111220001 is an apocalyptic number.

It is an amenable number.

212111220001 is a deficient number, since it is larger than the sum of its proper divisors (1315841119).

212111220001 is a wasteful number, since it uses less digits than its factorization.

212111220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694103.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212111220001 its reverse (100022111212), we get a palindrome (312133331213).

The spelling of 212111220001 in words is "two hundred twelve billion, one hundred eleven million, two hundred twenty thousand, one".