10200121011 has 6 divisors (see below), whose sum is σ = 14733508140. Its totient is φ = 6800080668.

The previous prime is 10200121007. The next prime is 10200121049. The reversal of 10200121011 is 11012100201.

It is a happy number.

It is not a de Polignac number, because 10200121011 - 2² = 10200121007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1133346779 = 10200121011 / (1 + 0 + 2 + 0 + 0 + 1 + 2 + 1 + 0 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 10200120984 and 10200121002.

It is not an unprimeable number, because it can be changed into a prime (10200121051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566673381 + ... + 566673398.

It is an arithmetic number, because the mean of its divisors is an integer number (2455584690).

Almost surely, 2^10200121011 is an apocalyptic number.

10200121011 is a deficient number, since it is larger than the sum of its proper divisors (4533387129).

10200121011 is a wasteful number, since it uses less digits than its factorization.

10200121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133346785 (or 1133346782 counting only the distinct ones).

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

Adding to 10200121011 its reverse (11012100201), we get a palindrome (21212221212).

The spelling of 10200121011 in words is "ten billion, two hundred million, one hundred twenty-one thousand, eleven".