1220152201531 has 4 divisors (see below), whose sum is σ = 1220385193632. Its totient is φ = 1219919209432.

The previous prime is 1220152201519. The next prime is 1220152201603. The reversal of 1220152201531 is 1351022510221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220152201531 - 2¹³ = 1220152193339 is a prime.

It is a super-2 number, since 2×1220152201531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220152201496 and 1220152201505.

It is not an unprimeable number, because it can be changed into a prime (1220152201511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116488195 + ... + 116498668.

It is an arithmetic number, because the mean of its divisors is an integer number (305096298408).

Almost surely, 2^{1220152201531} is an apocalyptic number.

1220152201531 is a deficient number, since it is larger than the sum of its proper divisors (232992101).

1220152201531 is an equidigital number, since it uses as much as digits as its factorization.

1220152201531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232992100.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 1220152201531 its reverse (1351022510221), we get a palindrome (2571174711752).

The spelling of 1220152201531 in words is "one trillion, two hundred twenty billion, one hundred fifty-two million, two hundred one thousand, five hundred thirty-one".