2121444101421 has 48 divisors (see below), whose sum is σ = 3201936192000. Its totient is φ = 1351900990080.

The previous prime is 2121444101407. The next prime is 2121444101507. The reversal of 2121444101421 is 1241014441212.

2121444101421 is a `hidden beast` number, since 2 + 1 + 214 + 4 + 410 + 14 + 21 = 666.

It is not a de Polignac number, because 2121444101421 - 2²⁵ = 2121410546989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121444101221) 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, 217601455 + ... + 217611203.

It is an arithmetic number, because the mean of its divisors is an integer number (66707004000).

Almost surely, 2^{2121444101421} is an apocalyptic number.

It is an amenable number.

2121444101421 is a deficient number, since it is larger than the sum of its proper divisors (1080492090579).

2121444101421 is a wasteful number, since it uses less digits than its factorization.

2121444101421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19266 (or 19263 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

Adding to 2121444101421 its reverse (1241014441212), we get a palindrome (3362458542633).

The spelling of 2121444101421 in words is "two trillion, one hundred twenty-one billion, four hundred forty-four million, one hundred one thousand, four hundred twenty-one".