212201051501 has 4 divisors (see below), whose sum is σ = 212201998812. Its totient is φ = 212200104192.

The previous prime is 212201051497. The next prime is 212201051509. The reversal of 212201051501 is 105150102212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 52260246025 + 159940805476 = 228605^2 + 399926^2 .

It is a cyclic number.

It is not a de Polignac number, because 212201051501 - 2² = 212201051497 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 (212201051509) 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, 71501 + ... + 655373.

It is an arithmetic number, because the mean of its divisors is an integer number (53050499703).

Almost surely, 2^212201051501 is an apocalyptic number.

It is an amenable number.

212201051501 is a deficient number, since it is larger than the sum of its proper divisors (947311).

212201051501 is an equidigital number, since it uses as much as digits as its factorization.

212201051501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947310.

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 212201051501 its reverse (105150102212), we get a palindrome (317351153713).

The spelling of 212201051501 in words is "two hundred twelve billion, two hundred one million, fifty-one thousand, five hundred one".