212101401421 has 48 divisors (see below), whose sum is σ = 276946295808. Its totient is φ = 160824787200.

The previous prime is 212101401409. The next prime is 212101401427. The reversal of 212101401421 is 124104101212.

It is a happy number.

It is not a de Polignac number, because 212101401421 - 2²¹ = 212099304269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101401427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1981801 + ... + 2086081.

It is an arithmetic number, because the mean of its divisors is an integer number (5769714496).

Almost surely, 2^212101401421 is an apocalyptic number.

It is an amenable number.

212101401421 is a deficient number, since it is larger than the sum of its proper divisors (64844894387).

212101401421 is a wasteful number, since it uses less digits than its factorization.

212101401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104442 (or 104435 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212101401421 its reverse (124104101212), we get a palindrome (336205502633).

The spelling of 212101401421 in words is "two hundred twelve billion, one hundred one million, four hundred one thousand, four hundred twenty-one".