1200102101020 has 48 divisors (see below), whose sum is σ = 2546238240000. Its totient is φ = 475087923200.

The previous prime is 1200102100999. The next prime is 1200102101137. The reversal of 1200102101020 is 201012010021.

It is a super-4 number, since 4×1200102101020⁴ (a number of 49 digits) contains 4444 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1200102100988 and 1200102101006.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4722156 + ... + 4969804.

It is an arithmetic number, because the mean of its divisors is an integer number (53046630000).

Almost surely, 2^{1200102101020} is an apocalyptic number.

1200102101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200102101020 is an abundant number, since it is smaller than the sum of its proper divisors (1346136138980).

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

1200102101020 is a wasteful number, since it uses less digits than its factorization.

1200102101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250158 (or 250156 counting only the distinct ones).

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

Adding to 1200102101020 its reverse (201012010021), we get a palindrome (1401114111041).

Subtracting from 1200102101020 its reverse (201012010021), we obtain a palindrome (999090090999).

The spelling of 1200102101020 in words is "one trillion, two hundred billion, one hundred two million, one hundred one thousand, twenty".