212211661151 has 16 divisors (see below), whose sum is σ = 246541059648. Its totient is φ = 178886534400.

The previous prime is 212211661139. The next prime is 212211661159. The reversal of 212211661151 is 151166112212.

It is not a de Polignac number, because 212211661151 - 2³⁰ = 211137919327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211661159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3062771 + ... + 3131291.

It is an arithmetic number, because the mean of its divisors is an integer number (15408816228).

Almost surely, 2^212211661151 is an apocalyptic number.

212211661151 is a deficient number, since it is larger than the sum of its proper divisors (34329398497).

212211661151 is an equidigital number, since it uses as much as digits as its factorization.

212211661151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75842.

The product of its digits is 1440, while the sum is 29.

Adding to 212211661151 its reverse (151166112212), we get a palindrome (363377773363).

The spelling of 212211661151 in words is "two hundred twelve billion, two hundred eleven million, six hundred sixty-one thousand, one hundred fifty-one".