223121023420 has 48 divisors (see below), whose sum is σ = 469244160000. Its totient is φ = 89117098560.

The previous prime is 223121023409. The next prime is 223121023429. The reversal of 223121023420 is 24320121322.

It is a super-3 number, since 3×223121023420³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223121023391 and 223121023400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223121023429) 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, 52732705 + ... + 52736935.

It is an arithmetic number, because the mean of its divisors is an integer number (9775920000).

Almost surely, 2^223121023420 is an apocalyptic number.

223121023420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223121023420 is an abundant number, since it is smaller than the sum of its proper divisors (246123136580).

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

223121023420 is a wasteful number, since it uses less digits than its factorization.

223121023420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7498 (or 7496 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 223121023420 its reverse (24320121322), we get a palindrome (247441144742).

The spelling of 223121023420 in words is "two hundred twenty-three billion, one hundred twenty-one million, twenty-three thousand, four hundred twenty".