210100021011 has 12 divisors (see below), whose sum is σ = 309934783392. Its totient is φ = 137086538256.

The previous prime is 210100021007. The next prime is 210100021013. The reversal of 210100021011 is 110120001012.

It is a happy number.

It is not a de Polignac number, because 210100021011 - 2² = 210100021007 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 210100020984 and 210100021002.

It is not an unprimeable number, because it can be changed into a prime (210100021013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248344756 + ... + 248345601.

It is an arithmetic number, because the mean of its divisors is an integer number (25827898616).

Almost surely, 2^210100021011 is an apocalyptic number.

210100021011 is a deficient number, since it is larger than the sum of its proper divisors (99834762381).

210100021011 is a wasteful number, since it uses less digits than its factorization.

210100021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496690410 (or 496690407 counting only the distinct ones).

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

Adding to 210100021011 its reverse (110120001012), we get a palindrome (320220022023).

The spelling of 210100021011 in words is "two hundred ten billion, one hundred million, twenty-one thousand, eleven".