1001020121002 has 48 divisors (see below), whose sum is σ = 1660771281960. Its totient is φ = 452164085120.

The previous prime is 1001020120957. The next prime is 1001020121021. The reversal of 1001020121002 is 2001210201001.

It can be written as a sum of positive squares in 4 ways, for example, as 969651814681 + 31368306321 = 984709^2 + 177111^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1001020121002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116759988 + ... + 116768560.

Almost surely, 2^{1001020121002} is an apocalyptic number.

1001020121002 is a deficient number, since it is larger than the sum of its proper divisors (659751160958).

1001020121002 is a wasteful number, since it uses less digits than its factorization.

1001020121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11559 (or 11548 counting only the distinct ones).

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

Adding to 1001020121002 its reverse (2001210201001), we get a palindrome (3002230322003).

The spelling of 1001020121002 in words is "one trillion, one billion, twenty million, one hundred twenty-one thousand, two".