2121144401 has 8 divisors (see below), whose sum is σ = 2238415680. Its totient is φ = 2004436368.

The previous prime is 2121144379. The next prime is 2121144407. The reversal of 2121144401 is 1044411212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121144401 - 2²² = 2116950097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121144407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133061 + ... + 148146.

It is an arithmetic number, because the mean of its divisors is an integer number (279801960).

Almost surely, 2^2121144401 is an apocalyptic number.

It is an amenable number.

2121144401 is a deficient number, since it is larger than the sum of its proper divisors (117271279).

2121144401 is a wasteful number, since it uses less digits than its factorization.

2121144401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281623.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 2121144401 is about 46055.8834569483. The cubic root of 2121144401 is about 1284.8627692378.

Adding to 2121144401 its reverse (1044411212), we get a palindrome (3165555613).

The spelling of 2121144401 in words is "two billion, one hundred twenty-one million, one hundred forty-four thousand, four hundred one".