21102022101 has 4 divisors (see below), whose sum is σ = 28136029472. Its totient is φ = 14068014732.

The previous prime is 21102022087. The next prime is 21102022111. The reversal of 21102022101 is 10122020112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21102022101 - 2¹¹ = 21102020053 is a prime.

It is a super-3 number, since 3×21102022101³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102022111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3517003681 + ... + 3517003686.

It is an arithmetic number, because the mean of its divisors is an integer number (7034007368).

Almost surely, 2^21102022101 is an apocalyptic number.

It is an amenable number.

21102022101 is a deficient number, since it is larger than the sum of its proper divisors (7034007371).

21102022101 is an equidigital number, since it uses as much as digits as its factorization.

21102022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034007370.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21102022101 its reverse (10122020112), we get a palindrome (31224042213).

The spelling of 21102022101 in words is "twenty-one billion, one hundred two million, twenty-two thousand, one hundred one".