21211101033 has 24 divisors (see below), whose sum is σ = 29761396800. Its totient is φ = 13421522016.

The previous prime is 21211101029. The next prime is 21211101083. The reversal of 21211101033 is 33010111212.

It is a happy number.

It is not a de Polignac number, because 21211101033 - 2² = 21211101029 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21211101083) 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 23 ways as a sum of consecutive naturals, for example, 267828 + ... + 337866.

It is an arithmetic number, because the mean of its divisors is an integer number (1240058200).

Almost surely, 2^21211101033 is an apocalyptic number.

It is an amenable number.

21211101033 is a deficient number, since it is larger than the sum of its proper divisors (8550295767).

21211101033 is an equidigital number, since it uses as much as digits as its factorization.

21211101033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70189 (or 70130 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21211101033 its reverse (33010111212), we get a palindrome (54221212245).

The spelling of 21211101033 in words is "twenty-one billion, two hundred eleven million, one hundred one thousand, thirty-three".