101211985 has 32 divisors (see below), whose sum is σ = 143265024. Its totient is φ = 67200000.

The previous prime is 101211967. The next prime is 101212003. The reversal of 101211985 is 589112101.

It is an interprime number because it is at equal distance from previous prime (101211967) and next prime (101212003).

It is not a de Polignac number, because 101211985 - 2⁷ = 101211857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 360045 + ... + 360325.

It is an arithmetic number, because the mean of its divisors is an integer number (4477032).

Almost surely, 2^101211985 is an apocalyptic number.

It is an amenable number.

101211985 is a deficient number, since it is larger than the sum of its proper divisors (42053039).

101211985 is a wasteful number, since it uses less digits than its factorization.

101211985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585.

The product of its (nonzero) digits is 720, while the sum is 28.

The square root of 101211985 is about 10060.4167408711. The cubic root of 101211985 is about 466.0265370141.

The spelling of 101211985 in words is "one hundred one million, two hundred eleven thousand, nine hundred eighty-five".