223121132212 has 24 divisors (see below), whose sum is σ = 427578161472. Its totient is φ = 101033068800.

The previous prime is 223121132209. The next prime is 223121132237. The reversal of 223121132212 is 212231121322.

It is a super-3 number, since 3×223121132212³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9628989 + ... + 9652132.

It is an arithmetic number, because the mean of its divisors is an integer number (17815756728).

Almost surely, 2^223121132212 is an apocalyptic number.

223121132212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

223121132212 is a deficient number, since it is larger than the sum of its proper divisors (204457029260).

223121132212 is a wasteful number, since it uses less digits than its factorization.

223121132212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19281399 (or 19281397 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

Adding to 223121132212 its reverse (212231121322), we get a palindrome (435352253534).

The spelling of 223121132212 in words is "two hundred twenty-three billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred twelve".