1212020100111 has 32 divisors (see below), whose sum is σ = 1677152207808. Its totient is φ = 777919334400.

The previous prime is 1212020100101. The next prime is 1212020100121. The reversal of 1212020100111 is 1110010202121.

It is an interprime number because it is at equal distance from previous prime (1212020100101) and next prime (1212020100121).

It is not a de Polignac number, because 1212020100111 - 2²⁶ = 1211952991247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212020100101) 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, 18948295 + ... + 19012151.

It is an arithmetic number, because the mean of its divisors is an integer number (52411006494).

Almost surely, 2^{1212020100111} is an apocalyptic number.

1212020100111 is a deficient number, since it is larger than the sum of its proper divisors (465132107697).

1212020100111 is a wasteful number, since it uses less digits than its factorization.

1212020100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65691.

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

Adding to 1212020100111 its reverse (1110010202121), we get a palindrome (2322030302232).

It can be divided in two parts, 1212020 and 100111, that added together give a palindrome (1312131).

The spelling of 1212020100111 in words is "one trillion, two hundred twelve billion, twenty million, one hundred thousand, one hundred eleven".