21144224310 has 64 divisors (see below), whose sum is σ = 55373635584. Its totient is φ = 5124556800.

The previous prime is 21144224287. The next prime is 21144224333. The reversal of 21144224310 is 1342244112.

It is an interprime number because it is at equal distance from previous prime (21144224287) and next prime (21144224333).

It is a super-2 number, since 2×21144224310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2086155 + ... + 2096265.

It is an arithmetic number, because the mean of its divisors is an integer number (865213056).

Almost surely, 2^21144224310 is an apocalyptic number.

21144224310 is an abundant number, since it is smaller than the sum of its proper divisors (34229411274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21144224310 is a wasteful number, since it uses less digits than its factorization.

21144224310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16469.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21144224310 its reverse (1342244112), we get a palindrome (22486468422).

The spelling of 21144224310 in words is "twenty-one billion, one hundred forty-four million, two hundred twenty-four thousand, three hundred ten".