211123031021112 has 64 divisors (see below), whose sum is σ = 606541304678400. Its totient is φ = 59987601544320.

The previous prime is 211123031021099. The next prime is 211123031021117. The reversal of 211123031021112 is 211120130321112.

It is a super-2 number, since 2×211123031021112² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211123031021117) 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, 3471474312 + ... + 3471535127.

It is an arithmetic number, because the mean of its divisors is an integer number (9477207885600).

Almost surely, 2^{211123031021112} is an apocalyptic number.

It is an amenable number.

211123031021112 is an abundant number, since it is smaller than the sum of its proper divisors (395418273657288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211123031021112 is a wasteful number, since it uses less digits than its factorization.

211123031021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6943009636 (or 6943009632 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 211123031021112 its reverse (211120130321112), we get a palindrome (422243161342224).

The spelling of 211123031021112 in words is "two hundred eleven trillion, one hundred twenty-three billion, thirty-one million, twenty-one thousand, one hundred twelve".