1021200102010 has 64 divisors (see below), whose sum is σ = 2120810688000. Its totient is φ = 350133537600.

The previous prime is 1021200102007. The next prime is 1021200102017. The reversal of 1021200102010 is 102010021201.

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

It is not an unprimeable number, because it can be changed into a prime (1021200102017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 716860 + ... + 1598839.

It is an arithmetic number, because the mean of its divisors is an integer number (33137667000).

Almost surely, 2^{1021200102010} is an apocalyptic number.

1021200102010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021200102010 is an abundant number, since it is smaller than the sum of its proper divisors (1099610585990).

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

1021200102010 is a wasteful number, since it uses less digits than its factorization.

1021200102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315947.

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

Adding to 1021200102010 its reverse (102010021201), we get a palindrome (1123210123211).

The spelling of 1021200102010 in words is "one trillion, twenty-one billion, two hundred million, one hundred two thousand, ten".