21203231101322 has 4 divisors (see below), whose sum is σ = 31804846651986. Its totient is φ = 10601615550660.

The previous prime is 21203231101309. The next prime is 21203231101337. The reversal of 21203231101322 is 22310113230212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20447407778161 + 755823323161 = 4521881^2 + 869381^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300807775329 + ... + 5300807775332.

Almost surely, 2^{21203231101322} is an apocalyptic number.

21203231101322 is a deficient number, since it is larger than the sum of its proper divisors (10601615550664).

21203231101322 is a wasteful number, since it uses less digits than its factorization.

21203231101322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601615550663.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21203231101322 its reverse (22310113230212), we get a palindrome (43513344331534).

The spelling of 21203231101322 in words is "twenty-one trillion, two hundred three billion, two hundred thirty-one million, one hundred one thousand, three hundred twenty-two".