121002010011 has 18 divisors (see below), whose sum is σ = 182710246628. Its totient is φ = 77160699000.

The previous prime is 121002010009. The next prime is 121002010033. The reversal of 121002010011 is 110010200121.

It is a happy number.

It is not a de Polignac number, because 121002010011 - 2¹ = 121002010009 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 = 121002009975 and 121002010002.

It is not an unprimeable number, because it can be changed into a prime (121002010001) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12702865 + ... + 12712386.

Almost surely, 2^121002010011 is an apocalyptic number.

121002010011 is a deficient number, since it is larger than the sum of its proper divisors (61708236617).

121002010011 is a wasteful number, since it uses less digits than its factorization.

121002010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25415303 (or 25415277 counting only the distinct ones).

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

Adding to 121002010011 its reverse (110010200121), we get a palindrome (231012210132).

The spelling of 121002010011 in words is "one hundred twenty-one billion, two million, ten thousand, eleven".