1221105201501 has 8 divisors (see below), whose sum is σ = 1680660922624. Its totient is φ = 787809807360.

The previous prime is 1221105201497. The next prime is 1221105201521. The reversal of 1221105201501 is 1051025011221.

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

It is not a de Polignac number, because 1221105201501 - 2² = 1221105201497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221105201521) 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, 6565081636 + ... + 6565081821.

It is an arithmetic number, because the mean of its divisors is an integer number (210082615328).

Almost surely, 2^{1221105201501} is an apocalyptic number.

It is an amenable number.

1221105201501 is a deficient number, since it is larger than the sum of its proper divisors (459555721123).

1221105201501 is a wasteful number, since it uses less digits than its factorization.

1221105201501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13130163491.

The product of its (nonzero) digits is 200, while the sum is 21.

The spelling of 1221105201501 in words is "one trillion, two hundred twenty-one billion, one hundred five million, two hundred one thousand, five hundred one".