212146422151 has 4 divisors (see below), whose sum is σ = 224625623472. Its totient is φ = 199667220832.

The previous prime is 212146422133. The next prime is 212146422179. The reversal of 212146422151 is 151224641212.

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

It is a cyclic number.

It is not a de Polignac number, because 212146422151 - 2¹¹ = 212146420103 is a prime.

It is a super-2 number, since 2×212146422151² (a number of 23 digits) contains 22 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 (212146422121) 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 3 ways as a sum of consecutive naturals, for example, 6239600635 + ... + 6239600668.

It is an arithmetic number, because the mean of its divisors is an integer number (56156405868).

Almost surely, 2^212146422151 is an apocalyptic number.

212146422151 is a deficient number, since it is larger than the sum of its proper divisors (12479201321).

212146422151 is a wasteful number, since it uses less digits than its factorization.

212146422151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12479201320.

The product of its digits is 7680, while the sum is 31.

The spelling of 212146422151 in words is "two hundred twelve billion, one hundred forty-six million, four hundred twenty-two thousand, one hundred fifty-one".