1221151600701 has 16 divisors (see below), whose sum is σ = 1904329982400. Its totient is φ = 771253642224.

The previous prime is 1221151600699. The next prime is 1221151600733. The reversal of 1221151600701 is 1070061511221.

1221151600701 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 1 + 51 + 600 + 7 + 0 + 1 = 666.

It is not a de Polignac number, because 1221151600701 - 2¹ = 1221151600699 is a prime.

It is a super-2 number, since 2×1221151600701² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221151600741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1190205726 + ... + 1190206751.

It is an arithmetic number, because the mean of its divisors is an integer number (119020623900).

Almost surely, 2^{1221151600701} is an apocalyptic number.

It is an amenable number.

1221151600701 is a deficient number, since it is larger than the sum of its proper divisors (683178381699).

1221151600701 is a wasteful number, since it uses less digits than its factorization.

1221151600701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380412505 (or 2380412499 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

The spelling of 1221151600701 in words is "one trillion, two hundred twenty-one billion, one hundred fifty-one million, six hundred thousand, seven hundred one".