1020220120987 has 4 divisors (see below), whose sum is σ = 1020649328296. Its totient is φ = 1019790913680.

The previous prime is 1020220120919. The next prime is 1020220120999. The reversal of 1020220120987 is 7890210220201.

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 1020220120987 - 2⁷ = 1020220120859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020220120687) 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, 214600089 + ... + 214604842.

It is an arithmetic number, because the mean of its divisors is an integer number (255162332074).

Almost surely, 2^{1020220120987} is an apocalyptic number.

1020220120987 is a deficient number, since it is larger than the sum of its proper divisors (429207309).

1020220120987 is an equidigital number, since it uses as much as digits as its factorization.

1020220120987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429207308.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 1020220120987 in words is "one trillion, twenty billion, two hundred twenty million, one hundred twenty thousand, nine hundred eighty-seven".