212026151221 has 4 divisors (see below), whose sum is σ = 212031239200. Its totient is φ = 212021063244.

The previous prime is 212026151209. The next prime is 212026151243. The reversal of 212026151221 is 122151620212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212026151221 - 2²¹ = 212024054069 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 (212026151251) 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, 2480961 + ... + 2564998.

It is an arithmetic number, because the mean of its divisors is an integer number (53007809800).

Almost surely, 2^212026151221 is an apocalyptic number.

It is an amenable number.

212026151221 is a deficient number, since it is larger than the sum of its proper divisors (5087979).

212026151221 is an equidigital number, since it uses as much as digits as its factorization.

212026151221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5087978.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 212026151221 its reverse (122151620212), we get a palindrome (334177771433).

The spelling of 212026151221 in words is "two hundred twelve billion, twenty-six million, one hundred fifty-one thousand, two hundred twenty-one".