1220153453442 has 80 divisors (see below), whose sum is σ = 3408682698432. Its totient is φ = 316922971680.

The previous prime is 1220153453429. The next prime is 1220153453443. The reversal of 1220153453442 is 2443543510221.

It is a happy number.

1220153453442 is a `hidden beast` number, since 1 + 2 + 20 + 153 + 45 + 3 + 442 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1220153453397 and 1220153453406.

It is not an unprimeable number, because it can be changed into a prime (1220153453443) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 48895393 + ... + 48920340.

Almost surely, 2^{1220153453442} is an apocalyptic number.

1220153453442 is an abundant number, since it is smaller than the sum of its proper divisors (2188529244990).

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

1220153453442 is a wasteful number, since it uses less digits than its factorization.

1220153453442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97815765 (or 97815756 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 1220153453442 its reverse (2443543510221), we get a palindrome (3663696963663).

The spelling of 1220153453442 in words is "one trillion, two hundred twenty billion, one hundred fifty-three million, four hundred fifty-three thousand, four hundred forty-two".