21421022311 has 8 divisors (see below), whose sum is σ = 23109775920. Its totient is φ = 19738123392.

The previous prime is 21421022291. The next prime is 21421022321. The reversal of 21421022311 is 11322012412.

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

It is not a de Polignac number, because 21421022311 - 2⁹ = 21421021799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421022321) 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, 1456066 + ... + 1470703.

It is an arithmetic number, because the mean of its divisors is an integer number (2888721990).

Almost surely, 2^21421022311 is an apocalyptic number.

21421022311 is a deficient number, since it is larger than the sum of its proper divisors (1688753609).

21421022311 is a wasteful number, since it uses less digits than its factorization.

21421022311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927345.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21421022311 its reverse (11322012412), we get a palindrome (32743034723).

The spelling of 21421022311 in words is "twenty-one billion, four hundred twenty-one million, twenty-two thousand, three hundred eleven".