1012201985 has 8 divisors (see below), whose sum is σ = 1215539136. Its totient is φ = 809163760.

The previous prime is 1012201979. The next prime is 1012201997. The reversal of 1012201985 is 5891022101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1012201985 - 2⁴ = 1012201969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67211 + ... + 80880.

It is an arithmetic number, because the mean of its divisors is an integer number (151942392).

Almost surely, 2^1012201985 is an apocalyptic number.

It is an amenable number.

1012201985 is a deficient number, since it is larger than the sum of its proper divisors (203337151).

1012201985 is a wasteful number, since it uses less digits than its factorization.

1012201985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149463.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1012201985 is about 31815.1219548189. The cubic root of 1012201985 is about 1004.0508964135.

The spelling of 1012201985 in words is "one billion, twelve million, two hundred one thousand, nine hundred eighty-five".