211012221023 has 4 divisors (see below), whose sum is σ = 213984224208. Its totient is φ = 208040217840.

The previous prime is 211012221019. The next prime is 211012221029. The reversal of 211012221023 is 320122210112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211012221023 - 2² = 211012221019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211012220992 and 211012221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012221029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1486001486 + ... + 1486001627.

It is an arithmetic number, because the mean of its divisors is an integer number (53496056052).

Almost surely, 2^211012221023 is an apocalyptic number.

211012221023 is a deficient number, since it is larger than the sum of its proper divisors (2972003185).

211012221023 is an equidigital number, since it uses as much as digits as its factorization.

211012221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972003184.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211012221023 its reverse (320122210112), we get a palindrome (531134431135).

The spelling of 211012221023 in words is "two hundred eleven billion, twelve million, two hundred twenty-one thousand, twenty-three".