1021200212120 has 32 divisors (see below), whose sum is σ = 2506582339920. Its totient is φ = 371345531520.

The previous prime is 1021200212117. The next prime is 1021200212171. The reversal of 1021200212120 is 212120021201.

It is a junction number, because it is equal to n+sod(n) for n = 1021200212095 and 1021200212104.

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 7 ways as a sum of consecutive naturals, for example, 1160454347 + ... + 1160455226.

Almost surely, 2^{1021200212120} is an apocalyptic number.

1021200212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021200212120 is an abundant number, since it is smaller than the sum of its proper divisors (1485382127800).

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

1021200212120 is a wasteful number, since it uses less digits than its factorization.

1021200212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320909595 (or 2320909591 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021200212120 its reverse (212120021201), we get a palindrome (1233320233321).

The spelling of 1021200212120 in words is "one trillion, twenty-one billion, two hundred million, two hundred twelve thousand, one hundred twenty".