12122111101020 has 48 divisors (see below), whose sum is σ = 35417646351360. Its totient is φ = 3092016744256.

The previous prime is 12122111101019. The next prime is 12122111101021. The reversal of 12122111101020 is 2010111122121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12122111101019) and next prime (12122111101021).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122111101021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4392067860 + ... + 4392070619.

It is an arithmetic number, because the mean of its divisors is an integer number (737867632320).

Almost surely, 2^{12122111101020} is an apocalyptic number.

12122111101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122111101020 is an abundant number, since it is smaller than the sum of its proper divisors (23295535250340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12122111101020 is a wasteful number, since it uses less digits than its factorization.

12122111101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8784138514 (or 8784138512 counting only the distinct ones).

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

Adding to 12122111101020 its reverse (2010111122121), we get a palindrome (14132222223141).

The spelling of 12122111101020 in words is "twelve trillion, one hundred twenty-two billion, one hundred eleven million, one hundred one thousand, twenty".