1220521113253 has 16 divisors (see below), whose sum is σ = 1326234571200. Its totient is φ = 1116520554240.

The previous prime is 1220521113247. The next prime is 1220521113293. The reversal of 1220521113253 is 3523111250221.

It is a de Polignac number, because none of the positive numbers 2^k-1220521113253 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 (1220521113293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 773613 + ... + 1743421.

It is an arithmetic number, because the mean of its divisors is an integer number (82889660700).

Almost surely, 2^{1220521113253} is an apocalyptic number.

1220521113253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220521113253 is a deficient number, since it is larger than the sum of its proper divisors (105713457947).

1220521113253 is a wasteful number, since it uses less digits than its factorization.

1220521113253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970692.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 1220521113253 its reverse (3523111250221), we get a palindrome (4743632363474).

The spelling of 1220521113253 in words is "one trillion, two hundred twenty billion, five hundred twenty-one million, one hundred thirteen thousand, two hundred fifty-three".