1001211002010 has 24 divisors (see below), whose sum is σ = 2603148605460. Its totient is φ = 266989600512.

The previous prime is 1001211002009. The next prime is 1001211002053. The reversal of 1001211002010 is 102001121001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 999662028561 + 1548973449 = 999831^2 + 39357^2 .

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 = 1001211001983 and 1001211002001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5562283255 + ... + 5562283434.

Almost surely, 2^{1001211002010} is an apocalyptic number.

1001211002010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001211002010 is an abundant number, since it is smaller than the sum of its proper divisors (1601937603450).

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

1001211002010 is a wasteful number, since it uses less digits than its factorization.

1001211002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124566702 (or 11124566699 counting only the distinct ones).

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

Adding to 1001211002010 its reverse (102001121001), we get a palindrome (1103212123011).

The spelling of 1001211002010 in words is "one trillion, one billion, two hundred eleven million, two thousand, ten".