1002012210121 has 16 divisors (see below), whose sum is σ = 1164123820944. Its totient is φ = 854101407744.

The previous prime is 1002012210113. The next prime is 1002012210167. The reversal of 1002012210121 is 1210122102001.

It can be written as a sum of positive squares in 8 ways, for example, as 171179960121 + 830832250000 = 413739^2 + 911500^2 .

It is not a de Polignac number, because 1002012210121 - 2³ = 1002012210113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002012210721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42761796 + ... + 42785221.

It is an arithmetic number, because the mean of its divisors is an integer number (72757738809).

Almost surely, 2^{1002012210121} is an apocalyptic number.

It is an amenable number.

1002012210121 is a deficient number, since it is larger than the sum of its proper divisors (162111610823).

1002012210121 is a wasteful number, since it uses less digits than its factorization.

1002012210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85547100.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1002012210121 its reverse (1210122102001), we get a palindrome (2212134312122).

The spelling of 1002012210121 in words is "one trillion, two billion, twelve million, two hundred ten thousand, one hundred twenty-one".