21120021210101 has 8 divisors (see below), whose sum is σ = 23040060981600. Its totient is φ = 19199987745840.

The previous prime is 21120021210097. The next prime is 21120021210103. The reversal of 21120021210101 is 10101212002112.

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

It is not a de Polignac number, because 21120021210101 - 2² = 21120021210097 is a prime.

It is a super-2 number, since 2×21120021210101² (a number of 27 digits) contains 22 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 (21120021210103) 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, 7902290 + ... + 10231628.

It is an arithmetic number, because the mean of its divisors is an integer number (2880007622700).

Almost surely, 2^{21120021210101} is an apocalyptic number.

It is an amenable number.

21120021210101 is a deficient number, since it is larger than the sum of its proper divisors (1920039771499).

21120021210101 is a wasteful number, since it uses less digits than its factorization.

21120021210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153619.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21120021210101 its reverse (10101212002112), we get a palindrome (31221233212213).

The spelling of 21120021210101 in words is "twenty-one trillion, one hundred twenty billion, twenty-one million, two hundred ten thousand, one hundred one".