21203031213310 has 16 divisors (see below), whose sum is σ = 38168103330000. Its totient is φ = 8480624230656.

The previous prime is 21203031213241. The next prime is 21203031213347. The reversal of 21203031213310 is 1331213030212.

It is a super-2 number, since 2×21203031213310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73380435 + ... + 73668814.

It is an arithmetic number, because the mean of its divisors is an integer number (2385506458125).

Almost surely, 2^{21203031213310} is an apocalyptic number.

21203031213310 is a deficient number, since it is larger than the sum of its proper divisors (16965072116690).

21203031213310 is a wasteful number, since it uses less digits than its factorization.

21203031213310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147063675.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21203031213310 its reverse (1331213030212), we get a palindrome (22534244243522).

The spelling of 21203031213310 in words is "twenty-one trillion, two hundred three billion, thirty-one million, two hundred thirteen thousand, three hundred ten".