1220214551501 has 24 divisors (see below), whose sum is σ = 1400569978752. Its totient is φ = 1060276632800.

The previous prime is 1220214551473. The next prime is 1220214551533. The reversal of 1220214551501 is 1051554120221.

It is not a de Polignac number, because 1220214551501 - 2³⁸ = 945336644557 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 (1220214551581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3643991 + ... + 3964731.

It is an arithmetic number, because the mean of its divisors is an integer number (58357082448).

Almost surely, 2^{1220214551501} is an apocalyptic number.

1220214551501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220214551501 is a deficient number, since it is larger than the sum of its proper divisors (180355427251).

1220214551501 is a wasteful number, since it uses less digits than its factorization.

1220214551501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322153 (or 322142 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 1220214551501 its reverse (1051554120221), we get a palindrome (2271768671722).

The spelling of 1220214551501 in words is "one trillion, two hundred twenty billion, two hundred fourteen million, five hundred fifty-one thousand, five hundred one".