21102101033 has 8 divisors (see below), whose sum is σ = 22768965576. Its totient is φ = 19441468800.

The previous prime is 21102101029. The next prime is 21102101057. The reversal of 21102101033 is 33010120112.

It can be written as a sum of positive squares in 4 ways, for example, as 419922064 + 20682178969 = 20492^2 + 143813^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21102101033 - 2² = 21102101029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102100999 and 21102101017.

It is not an unprimeable number, because it can be changed into a prime (21102101533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1551038 + ... + 1564583.

It is an arithmetic number, because the mean of its divisors is an integer number (2846120697).

Almost surely, 2^21102101033 is an apocalyptic number.

It is an amenable number.

21102101033 is a deficient number, since it is larger than the sum of its proper divisors (1666864543).

21102101033 is a wasteful number, since it uses less digits than its factorization.

21102101033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116155.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21102101033 its reverse (33010120112), we get a palindrome (54112221145).

The spelling of 21102101033 in words is "twenty-one billion, one hundred two million, one hundred one thousand, thirty-three".