211020010101 has 12 divisors (see below), whose sum is σ = 304945069728. Its totient is φ = 140616135144.

The previous prime is 211020010093. The next prime is 211020010109. The reversal of 211020010101 is 101010020112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211020010093) and next prime (211020010109).

It is not a de Polignac number, because 211020010101 - 2³ = 211020010093 is a prime.

It is a super-2 number, since 2×211020010101² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020010109) 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, 5301705 + ... + 5341358.

It is an arithmetic number, because the mean of its divisors is an integer number (25412089144).

Almost surely, 2^211020010101 is an apocalyptic number.

It is an amenable number.

211020010101 is a deficient number, since it is larger than the sum of its proper divisors (93925059627).

211020010101 is a wasteful number, since it uses less digits than its factorization.

211020010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10645272 (or 10645269 counting only the distinct ones).

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

Adding to 211020010101 its reverse (101010020112), we get a palindrome (312030030213).

The spelling of 211020010101 in words is "two hundred eleven billion, twenty million, ten thousand, one hundred one".