1220445525252 has 216 divisors, whose sum is σ = 3159749768448. Its totient is φ = 366329589120.

The previous prime is 1220445525251. The next prime is 1220445525281. The reversal of 1220445525252 is 2525255440221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220445525252.

It is not an unprimeable number, because it can be changed into a prime (1220445525251) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 225713133 + ... + 225718539.

Almost surely, 2^{1220445525252} is an apocalyptic number.

1220445525252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220445525252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1579874884224).

1220445525252 is an abundant number, since it is smaller than the sum of its proper divisors (1939304243196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220445525252 is a wasteful number, since it uses less digits than its factorization.

1220445525252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559 (or 5503 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 39.

The spelling of 1220445525252 in words is "one trillion, two hundred twenty billion, four hundred forty-five million, five hundred twenty-five thousand, two hundred fifty-two".