1212212011020 has 24 divisors (see below), whose sum is σ = 3394193631024. Its totient is φ = 323256536256.

The previous prime is 1212212011013. The next prime is 1212212011027. The reversal of 1212212011020 is 201102122121.

It is an interprime number because it is at equal distance from previous prime (1212212011013) and next prime (1212212011027).

It is a super-2 number, since 2×1212212011020² (a number of 25 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1212212011027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10101766699 + ... + 10101766818.

It is an arithmetic number, because the mean of its divisors is an integer number (141424734626).

Almost surely, 2^{1212212011020} is an apocalyptic number.

1212212011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212212011020 is an abundant number, since it is smaller than the sum of its proper divisors (2181981620004).

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

1212212011020 is a wasteful number, since it uses less digits than its factorization.

1212212011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20203533529 (or 20203533527 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212212011020 its reverse (201102122121), we get a palindrome (1413314133141).

The spelling of 1212212011020 in words is "one trillion, two hundred twelve billion, two hundred twelve million, eleven thousand, twenty".