211012221123 has 64 divisors (see below), whose sum is σ = 356216140800. Its totient is φ = 122277012480.

The previous prime is 211012221103. The next prime is 211012221143. The reversal of 211012221123 is 321122210112.

It is an interprime number because it is at equal distance from previous prime (211012221103) and next prime (211012221143).

It is not a de Polignac number, because 211012221123 - 2⁶ = 211012221059 is a prime.

It is a super-2 number, since 2×211012221123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211012221096 and 211012221105.

It is not an unprimeable number, because it can be changed into a prime (211012221103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 768211 + ... + 1006067.

It is an arithmetic number, because the mean of its divisors is an integer number (5565877200).

Almost surely, 2^211012221123 is an apocalyptic number.

211012221123 is a deficient number, since it is larger than the sum of its proper divisors (145203919677).

211012221123 is a wasteful number, since it uses less digits than its factorization.

211012221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238009 (or 238003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 211012221123 its reverse (321122210112), we get a palindrome (532134431235).

The spelling of 211012221123 in words is "two hundred eleven billion, twelve million, two hundred twenty-one thousand, one hundred twenty-three".