1221761314414 has 8 divisors (see below), whose sum is σ = 1832750443440. Its totient is φ = 610844499936.

The previous prime is 1221761314399. The next prime is 1221761314439. The reversal of 1221761314414 is 4144131671221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 18036379 + ... + 18103990.

It is an arithmetic number, because the mean of its divisors is an integer number (229093805430).

Almost surely, 2^{1221761314414} is an apocalyptic number.

1221761314414 is a deficient number, since it is larger than the sum of its proper divisors (610989129026).

1221761314414 is a wasteful number, since it uses less digits than its factorization.

1221761314414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36157274.

The product of its digits is 32256, while the sum is 37.

Adding to 1221761314414 its reverse (4144131671221), we get a palindrome (5365892985635).

The spelling of 1221761314414 in words is "one trillion, two hundred twenty-one billion, seven hundred sixty-one million, three hundred fourteen thousand, four hundred fourteen".