1210020120111 has 32 divisors (see below), whose sum is σ = 1773982176768. Its totient is φ = 727546285440.

The previous prime is 1210020120109. The next prime is 1210020120157. The reversal of 1210020120111 is 1110210200121.

It is not a de Polignac number, because 1210020120111 - 2¹ = 1210020120109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210020120181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3171621 + ... + 3532593.

It is an arithmetic number, because the mean of its divisors is an integer number (55436943024).

Almost surely, 2^{1210020120111} is an apocalyptic number.

1210020120111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1210020120111 is a deficient number, since it is larger than the sum of its proper divisors (563962056657).

1210020120111 is a wasteful number, since it uses less digits than its factorization.

1210020120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361791.

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

Adding to 1210020120111 its reverse (1110210200121), we get a palindrome (2320230320232).

The spelling of 1210020120111 in words is "one trillion, two hundred ten billion, twenty million, one hundred twenty thousand, one hundred eleven".