21001222101033 has 16 divisors (see below), whose sum is σ = 31115017230400. Its totient is φ = 13999871714400.

The previous prime is 21001222101023. The next prime is 21001222101049. The reversal of 21001222101033 is 33010122210012.

It is not a de Polignac number, because 21001222101033 - 2¹⁸ = 21001221838889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001222100997 and 21001222101015.

It is not an unprimeable number, because it can be changed into a prime (21001222101023) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 25786588 + ... + 26588541.

It is an arithmetic number, because the mean of its divisors is an integer number (1944688576900).

Almost surely, 2^{21001222101033} is an apocalyptic number.

It is an amenable number.

21001222101033 is a deficient number, since it is larger than the sum of its proper divisors (10113795129367).

21001222101033 is a wasteful number, since it uses less digits than its factorization.

21001222101033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52389989 (or 52389983 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21001222101033 its reverse (33010122210012), we get a palindrome (54011344311045).

The spelling of 21001222101033 in words is "twenty-one trillion, one billion, two hundred twenty-two million, one hundred one thousand, thirty-three".