1021010200120 has 32 divisors (see below), whose sum is σ = 2376489261600. Its totient is φ = 394321180288.

The previous prime is 1021010200109. The next prime is 1021010200141. The reversal of 1021010200120 is 210020101201.

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 = 1021010200097 and 1021010200106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440089444 + ... + 440091763.

It is an arithmetic number, because the mean of its divisors is an integer number (74265289425).

Almost surely, 2^{1021010200120} is an apocalyptic number.

1021010200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021010200120 is an abundant number, since it is smaller than the sum of its proper divisors (1355479061480).

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

1021010200120 is a wasteful number, since it uses less digits than its factorization.

1021010200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880181247 (or 880181243 counting only the distinct ones).

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

Adding to 1021010200120 its reverse (210020101201), we get a palindrome (1231030301321).

The spelling of 1021010200120 in words is "one trillion, twenty-one billion, ten million, two hundred thousand, one hundred twenty".