10121002011 has 12 divisors (see below), whose sum is σ = 14620636888. Its totient is φ = 6746683104.

The previous prime is 10121002009. The next prime is 10121002027. The reversal of 10121002011 is 11020012101.

It is a happy number.

It is not a de Polignac number, because 10121002011 - 2¹ = 10121002009 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121001984 and 10121002002.

It is not an unprimeable number, because it can be changed into a prime (10121002051) 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, 55836 + ... + 152838.

Almost surely, 2^10121002011 is an apocalyptic number.

10121002011 is a deficient number, since it is larger than the sum of its proper divisors (4499634877).

10121002011 is a wasteful number, since it uses less digits than its factorization.

10121002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108602 (or 108599 counting only the distinct ones).

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

Adding to 10121002011 its reverse (11020012101), we get a palindrome (21141014112).

The spelling of 10121002011 in words is "ten billion, one hundred twenty-one million, two thousand, eleven".