212322021401 has 4 divisors (see below), whose sum is σ = 242653738752. Its totient is φ = 181990304052.

The previous prime is 212322021397. The next prime is 212322021421. The reversal of 212322021401 is 104120223212.

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 212322021401 - 2² = 212322021397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212322021421) 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, 15165858665 + ... + 15165858678.

It is an arithmetic number, because the mean of its divisors is an integer number (60663434688).

Almost surely, 2^212322021401 is an apocalyptic number.

It is an amenable number.

212322021401 is a deficient number, since it is larger than the sum of its proper divisors (30331717351).

212322021401 is an equidigital number, since it uses as much as digits as its factorization.

212322021401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30331717350.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212322021401 its reverse (104120223212), we get a palindrome (316442244613).

The spelling of 212322021401 in words is "two hundred twelve billion, three hundred twenty-two million, twenty-one thousand, four hundred one".