1212020010100 has 18 divisors (see below), whose sum is σ = 2630083422134. Its totient is φ = 484808004000.

The previous prime is 1212020010067. The next prime is 1212020010133. The reversal of 1212020010100 is 10100202121.

It is an interprime number because it is at equal distance from previous prime (1212020010067) and next prime (1212020010133).

It can be written as a sum of positive squares in 3 ways, for example, as 37770367716 + 1174249642384 = 194346^2 + 1083628^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6060099951 + ... + 6060100150.

Almost surely, 2^{1212020010100} is an apocalyptic number.

1212020010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212020010100 is an abundant number, since it is smaller than the sum of its proper divisors (1418063412034).

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

1212020010100 is a wasteful number, since it uses less digits than its factorization.

1212020010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12120200115 (or 12120200108 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1212020010100 its reverse (10100202121), we get a palindrome (1222120212221).

The spelling of 1212020010100 in words is "one trillion, two hundred twelve billion, twenty million, ten thousand, one hundred".