1221015002053 has 16 divisors (see below), whose sum is σ = 1524871598976. Its totient is φ = 949835773440.

The previous prime is 1221015002017. The next prime is 1221015002107. The reversal of 1221015002053 is 3502005101221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221015002053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221015002953) 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, 13324776 + ... + 13416097.

It is an arithmetic number, because the mean of its divisors is an integer number (95304474936).

Almost surely, 2^{1221015002053} is an apocalyptic number.

It is an amenable number.

1221015002053 is a deficient number, since it is larger than the sum of its proper divisors (303856596923).

1221015002053 is a wasteful number, since it uses less digits than its factorization.

1221015002053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26741484.

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 1221015002053 in words is "one trillion, two hundred twenty-one billion, fifteen million, two thousand, fifty-three".