210102020221111 has 4 divisors (see below), whose sum is σ = 221160021285400. Its totient is φ = 199044019156824.

The previous prime is 210102020221043. The next prime is 210102020221129. The reversal of 210102020221111 is 111122020201012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210102020221111 is a prime.

It is a super-4 number, since 4×210102020221111⁴ (a number of 58 digits) contains 4444 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 (210102920221111) 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, 5529000532116 + ... + 5529000532153.

It is an arithmetic number, because the mean of its divisors is an integer number (55290005321350).

Almost surely, 2^{210102020221111} is an apocalyptic number.

210102020221111 is a deficient number, since it is larger than the sum of its proper divisors (11058001064289).

210102020221111 is a wasteful number, since it uses less digits than its factorization.

210102020221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11058001064288.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210102020221111 its reverse (111122020201012), we get a palindrome (321224040422123).

The spelling of 210102020221111 in words is "two hundred ten trillion, one hundred two billion, twenty million, two hundred twenty-one thousand, one hundred eleven".