2621211421 has 8 divisors (see below), whose sum is σ = 2650190400. Its totient is φ = 2592315648.

The previous prime is 2621211409. The next prime is 2621211431. The reversal of 2621211421 is 1241121262.

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 2621211421 - 2¹¹ = 2621209373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2621211392 and 2621211401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621211431) 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, 43645 + ... + 84541.

It is an arithmetic number, because the mean of its divisors is an integer number (331273800).

Almost surely, 2^2621211421 is an apocalyptic number.

It is an amenable number.

2621211421 is a deficient number, since it is larger than the sum of its proper divisors (28978979).

2621211421 is a wasteful number, since it uses less digits than its factorization.

2621211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41603.

The product of its digits is 384, while the sum is 22.

The square root of 2621211421 is about 51197.7677345409. The cubic root of 2621211421 is about 1378.7981240780.

Adding to 2621211421 its reverse (1241121262), we get a palindrome (3862332683).

The spelling of 2621211421 in words is "two billion, six hundred twenty-one million, two hundred eleven thousand, four hundred twenty-one".