223121211240 has 64 divisors (see below), whose sum is σ = 669403828800. Its totient is φ = 59495416832.

The previous prime is 223121211239. The next prime is 223121211253. The reversal of 223121211240 is 42112121322.

It is a happy number.

It is a super-3 number, since 3×223121211240³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2398639 + ... + 2489921.

It is an arithmetic number, because the mean of its divisors is an integer number (10459434825).

Almost surely, 2^223121211240 is an apocalyptic number.

223121211240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223121211240 is an abundant number, since it is smaller than the sum of its proper divisors (446282617560).

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

223121211240 is a wasteful number, since it uses less digits than its factorization.

223121211240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111666 (or 111662 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 223121211240 its reverse (42112121322), we get a palindrome (265233332562).

The spelling of 223121211240 in words is "two hundred twenty-three billion, one hundred twenty-one million, two hundred eleven thousand, two hundred forty".