212010102191 has 4 divisors (see below), whose sum is σ = 219320795400. Its totient is φ = 204699408984.

The previous prime is 212010102179. The next prime is 212010102197. The reversal of 212010102191 is 191201010212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212010102191 is a prime.

It is a super-3 number, since 3×212010102191³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010102197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3655346561 + ... + 3655346618.

It is an arithmetic number, because the mean of its divisors is an integer number (54830198850).

Almost surely, 2^212010102191 is an apocalyptic number.

212010102191 is a deficient number, since it is larger than the sum of its proper divisors (7310693209).

212010102191 is an equidigital number, since it uses as much as digits as its factorization.

212010102191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7310693208.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 212010102191 in words is "two hundred twelve billion, ten million, one hundred two thousand, one hundred ninety-one".