1201210120987 has 4 divisors (see below), whose sum is σ = 1201235146936. Its totient is φ = 1201185095040.

The previous prime is 1201210120973. The next prime is 1201210120997. The reversal of 1201210120987 is 7890210121021.

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 1201210120987 - 2¹⁵ = 1201210088219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201210120927) 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, 12440838 + ... + 12537019.

It is an arithmetic number, because the mean of its divisors is an integer number (300308786734).

Almost surely, 2^{1201210120987} is an apocalyptic number.

1201210120987 is a deficient number, since it is larger than the sum of its proper divisors (25025949).

1201210120987 is an equidigital number, since it uses as much as digits as its factorization.

1201210120987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25025948.

The product of its (nonzero) digits is 4032, while the sum is 34.

Adding to 1201210120987 its sum of digits (34), we get a palindrome (1201210121021).

The spelling of 1201210120987 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred twenty thousand, nine hundred eighty-seven".