210111020100021 has 8 divisors (see below), whose sum is σ = 280148190182784. Its totient is φ = 140073931708640.

The previous prime is 210111020099917. The next prime is 210111020100041. The reversal of 210111020100021 is 120001020111012.

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

It is a cyclic number.

It is not a de Polignac number, because 210111020100021 - 2¹⁴ = 210111020083637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210111020100041) 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, 14145885 + ... + 24906386.

It is an arithmetic number, because the mean of its divisors is an integer number (35018523772848).

Almost surely, 2^{210111020100021} is an apocalyptic number.

It is an amenable number.

210111020100021 is a deficient number, since it is larger than the sum of its proper divisors (70037170082763).

210111020100021 is a wasteful number, since it uses less digits than its factorization.

210111020100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40845691.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210111020100021 its reverse (120001020111012), we get a palindrome (330112040211033).

The spelling of 210111020100021 in words is "two hundred ten trillion, one hundred eleven billion, twenty million, one hundred thousand, twenty-one".