10002011121 has 24 divisors (see below), whose sum is σ = 14528745504. Its totient is φ = 6630514560.

The previous prime is 10002011119. The next prime is 10002011177. The reversal of 10002011121 is 12111020001.

It is a happy number.

It is not a de Polignac number, because 10002011121 - 2¹ = 10002011119 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (10002011101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1993506 + ... + 1998516.

It is an arithmetic number, because the mean of its divisors is an integer number (605364396).

Almost surely, 2^10002011121 is an apocalyptic number.

It is an amenable number.

10002011121 is a deficient number, since it is larger than the sum of its proper divisors (4526734383).

10002011121 is a wasteful number, since it uses less digits than its factorization.

10002011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6221 (or 6218 counting only the distinct ones).

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

Adding to 10002011121 its reverse (12111020001), we get a palindrome (22113031122).

The spelling of 10002011121 in words is "ten billion, two million, eleven thousand, one hundred twenty-one".