1221020140304 has 20 divisors (see below), whose sum is σ = 2366614973376. Its totient is φ = 610280792352.

The previous prime is 1221020140259. The next prime is 1221020140337. The reversal of 1221020140304 is 4030410201221.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14285924 + ... + 14371139.

Almost surely, 2^{1221020140304} is an apocalyptic number.

It is an amenable number.

1221020140304 is a deficient number, since it is larger than the sum of its proper divisors (1145594833072).

1221020140304 is a wasteful number, since it uses less digits than its factorization.

1221020140304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28659734 (or 28659728 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1221020140304 its reverse (4030410201221), we get a palindrome (5251430341525).

The spelling of 1221020140304 in words is "one trillion, two hundred twenty-one billion, twenty million, one hundred forty thousand, three hundred four".