210120211020111 has 12 divisors (see below), whose sum is σ = 325900735459992. Its totient is φ = 120068692011408.

The previous prime is 210120211020061. The next prime is 210120211020121. The reversal of 210120211020111 is 111020112021012.

It is a happy number.

It is not a de Polignac number, because 210120211020111 - 2¹⁵ = 210120210987343 is a prime.

It is a super-4 number, since 4×210120211020111⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120211020121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 714694595160 + ... + 714694595453.

It is an arithmetic number, because the mean of its divisors is an integer number (27158394621666).

Almost surely, 2^{210120211020111} is an apocalyptic number.

210120211020111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

210120211020111 is a deficient number, since it is larger than the sum of its proper divisors (115780524439881).

210120211020111 is a wasteful number, since it uses less digits than its factorization.

210120211020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429389190630 (or 1429389190623 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210120211020111 its reverse (111020112021012), we get a palindrome (321140323041123).

The spelling of 210120211020111 in words is "two hundred ten trillion, one hundred twenty billion, two hundred eleven million, twenty thousand, one hundred eleven".