1000011020121 has 12 divisors (see below), whose sum is σ = 1446241458480. Its totient is φ = 665851969080.

The previous prime is 1000011020119. The next prime is 1000011020123. The reversal of 1000011020121 is 1210201100001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1000011020119) and next prime (1000011020123).

It is not a de Polignac number, because 1000011020121 - 2¹ = 1000011020119 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1000011020123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68495991 + ... + 68510588.

It is an arithmetic number, because the mean of its divisors is an integer number (120520121540).

Almost surely, 2^{1000011020121} is an apocalyptic number.

It is an amenable number.

1000011020121 is a deficient number, since it is larger than the sum of its proper divisors (446230438359).

1000011020121 is a wasteful number, since it uses less digits than its factorization.

1000011020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137007396 (or 137007393 counting only the distinct ones).

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

Adding to 1000011020121 its reverse (1210201100001), we get a palindrome (2210212120122).

The spelling of 1000011020121 in words is "one trillion, eleven million, twenty thousand, one hundred twenty-one".