21010120022101 has 16 divisors (see below), whose sum is σ = 24027103117440. Its totient is φ = 17997022310400.

The previous prime is 21010120022051. The next prime is 21010120022107. The reversal of 21010120022101 is 10122002101012.

It is a de Polignac number, because none of the positive numbers 2^k-21010120022101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010120022107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476084805 + ... + 476128933.

It is an arithmetic number, because the mean of its divisors is an integer number (1501693944840).

Almost surely, 2^{21010120022101} is an apocalyptic number.

It is an amenable number.

21010120022101 is a deficient number, since it is larger than the sum of its proper divisors (3016983095339).

21010120022101 is a wasteful number, since it uses less digits than its factorization.

21010120022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86604.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010120022101 its reverse (10122002101012), we get a palindrome (31132122123113).

The spelling of 21010120022101 in words is "twenty-one trillion, ten billion, one hundred twenty million, twenty-two thousand, one hundred one".