1020120212111 has 24 divisors (see below), whose sum is σ = 1394130329424. Its totient is φ = 733752794880.

The previous prime is 1020120212039. The next prime is 1020120212141. The reversal of 1020120212111 is 1112120210201.

It is not a de Polignac number, because 1020120212111 - 2³⁰ = 1019046470287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020120212141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72785930 + ... + 72799943.

It is an arithmetic number, because the mean of its divisors is an integer number (58088763726).

Almost surely, 2^{1020120212111} is an apocalyptic number.

1020120212111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1020120212111 is a deficient number, since it is larger than the sum of its proper divisors (374010117313).

1020120212111 is a wasteful number, since it uses less digits than its factorization.

1020120212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145585911 (or 145585904 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1020120212111 its reverse (1112120210201), we get a palindrome (2132240422312).

The spelling of 1020120212111 in words is "one trillion, twenty billion, one hundred twenty million, two hundred twelve thousand, one hundred eleven".