211020001011 has 16 divisors (see below), whose sum is σ = 323402301600. Its totient is φ = 135828965664.

The previous prime is 211020001007. The next prime is 211020001037. The reversal of 211020001011 is 110100020112.

It is a happy number.

It is not a de Polignac number, because 211020001011 - 2² = 211020001007 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 = 211020000984 and 211020001002.

It is not an unprimeable number, because it can be changed into a prime (211020001001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134750176 + ... + 134751741.

It is an arithmetic number, because the mean of its divisors is an integer number (20212643850).

Almost surely, 2^211020001011 is an apocalyptic number.

211020001011 is a deficient number, since it is larger than the sum of its proper divisors (112382300589).

211020001011 is a wasteful number, since it uses less digits than its factorization.

211020001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269501955 (or 269501949 counting only the distinct ones).

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

Adding to 211020001011 its reverse (110100020112), we get a palindrome (321120021123).

The spelling of 211020001011 in words is "two hundred eleven billion, twenty million, one thousand, eleven".