1020101211 has 24 divisors (see below), whose sum is σ = 1525282304. Its totient is φ = 656449920.

The previous prime is 1020101191. The next prime is 1020101213. The reversal of 1020101211 is 1121010201.

It is a happy number.

It is not a de Polignac number, because 1020101211 - 2¹¹ = 1020099163 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 = 1020101193 and 1020101202.

It is not an unprimeable number, because it can be changed into a prime (1020101213) 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, 30231 + ... + 54351.

Almost surely, 2^1020101211 is an apocalyptic number.

1020101211 is a deficient number, since it is larger than the sum of its proper divisors (505181093).

1020101211 is a wasteful number, since it uses less digits than its factorization.

1020101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24291 (or 24288 counting only the distinct ones).

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

The square root of 1020101211 is about 31939.0233257061. The cubic root of 1020101211 is about 1006.6560029985.

Adding to 1020101211 its reverse (1121010201), we get a palindrome (2141111412).

The spelling of 1020101211 in words is "one billion, twenty million, one hundred one thousand, two hundred eleven".