1021200011010 has 64 divisors (see below), whose sum is σ = 2723714501760. Its totient is φ = 272268555840.

The previous prime is 1021200010979. The next prime is 1021200011021. The reversal of 1021200011010 is 101100021201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021200010983 and 1021200011001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1085305 + ... + 1794515.

It is an arithmetic number, because the mean of its divisors is an integer number (42558039090).

Almost surely, 2^{1021200011010} is an apocalyptic number.

1021200011010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021200011010 is an abundant number, since it is smaller than the sum of its proper divisors (1702514490750).

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

1021200011010 is a wasteful number, since it uses less digits than its factorization.

1021200011010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714560 (or 714554 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1021200011010 its reverse (101100021201), we get a palindrome (1122300032211).

The spelling of 1021200011010 in words is "one trillion, twenty-one billion, two hundred million, eleven thousand, ten".