1221423010340 has 48 divisors (see below), whose sum is σ = 2762410828800. Its totient is φ = 450968065920.

The previous prime is 1221423010337. The next prime is 1221423010369. The reversal of 1221423010340 is 430103241221.

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, 7143245 + ... + 7312235.

It is an arithmetic number, because the mean of its divisors is an integer number (57550225600).

Almost surely, 2^{1221423010340} is an apocalyptic number.

1221423010340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221423010340 is an abundant number, since it is smaller than the sum of its proper divisors (1540987818460).

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

1221423010340 is a wasteful number, since it uses less digits than its factorization.

1221423010340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196812 (or 196810 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1221423010340 its reverse (430103241221), we get a palindrome (1651526251561).

The spelling of 1221423010340 in words is "one trillion, two hundred twenty-one billion, four hundred twenty-three million, ten thousand, three hundred forty".