21033031221122 has 4 divisors (see below), whose sum is σ = 31549546831686. Its totient is φ = 10516515610560.

The previous prime is 21033031221091. The next prime is 21033031221133. The reversal of 21033031221122 is 22112213033012.

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., 19383864149521 + 1649167071601 = 4402711^2 + 1284199^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258257805279 + ... + 5258257805282.

Almost surely, 2^{21033031221122} is an apocalyptic number.

21033031221122 is a deficient number, since it is larger than the sum of its proper divisors (10516515610564).

21033031221122 is a wasteful number, since it uses less digits than its factorization.

21033031221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10516515610563.

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

Adding to 21033031221122 its reverse (22112213033012), we get a palindrome (43145244254134).

The spelling of 21033031221122 in words is "twenty-one trillion, thirty-three billion, thirty-one million, two hundred twenty-one thousand, one hundred twenty-two".