1223211403420 has 24 divisors (see below), whose sum is σ = 2638169460864. Its totient is φ = 476060654016.

The previous prime is 1223211403409. The next prime is 1223211403441. The reversal of 1223211403420 is 243041123221.

It is a super-2 number, since 2×1223211403420² (a number of 25 digits) contains 22 as substring.

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, 826493452 + ... + 826494931.

It is an arithmetic number, because the mean of its divisors is an integer number (109923727536).

Almost surely, 2^{1223211403420} is an apocalyptic number.

1223211403420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223211403420 is an abundant number, since it is smaller than the sum of its proper divisors (1414958057444).

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

1223211403420 is a wasteful number, since it uses less digits than its factorization.

1223211403420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652988429 (or 1652988427 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1223211403420 its reverse (243041123221), we get a palindrome (1466252526641).

The spelling of 1223211403420 in words is "one trillion, two hundred twenty-three billion, two hundred eleven million, four hundred three thousand, four hundred twenty".