1421243223240 has 32 divisors (see below), whose sum is σ = 4263729670080. Its totient is φ = 378998192832.

The previous prime is 1421243223227. The next prime is 1421243223247. The reversal of 1421243223240 is 423223421241.

It is a super-3 number, since 3×1421243223240³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1421243223198 and 1421243223207.

It is not an unprimeable number, because it can be changed into a prime (1421243223247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5921846644 + ... + 5921846883.

It is an arithmetic number, because the mean of its divisors is an integer number (133241552190).

Almost surely, 2^{1421243223240} is an apocalyptic number.

1421243223240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421243223240 is an abundant number, since it is smaller than the sum of its proper divisors (2842486446840).

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

1421243223240 is a wasteful number, since it uses less digits than its factorization.

1421243223240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11843693541 (or 11843693537 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 1421243223240 its reverse (423223421241), we get a palindrome (1844466644481).

The spelling of 1421243223240 in words is "one trillion, four hundred twenty-one billion, two hundred forty-three million, two hundred twenty-three thousand, two hundred forty".