212021401 has 2 divisors, whose sum is σ = 212021402. Its totient is φ = 212021400.

The previous prime is 212021393. The next prime is 212021413. The reversal of 212021401 is 104120212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210279001 + 1742400 = 14501^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021401 - 2³ = 212021393 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010700 + 106010701.

It is an arithmetic number, because the mean of its divisors is an integer number (106010701).

Almost surely, 2^212021401 is an apocalyptic number.

It is an amenable number.

212021401 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021401 is an equidigital number, since it uses as much as digits as its factorization.

212021401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212021401 is about 14560.9546733722. The cubic root of 212021401 is about 596.2932593173.

Adding to 212021401 its reverse (104120212), we get a palindrome (316141613).

The spelling of 212021401 in words is "two hundred twelve million, twenty-one thousand, four hundred one".