2001212012158 has 8 divisors (see below), whose sum is σ = 3001914903528. Its totient is φ = 1000573710984.

The previous prime is 2001212012089. The next prime is 2001212012159. The reversal of 2001212012158 is 8512102121002.

It is a happy number.

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

It is a super-2 number, since 2×2001212012158² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001212012159) 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, 16070016 + ... + 16194067.

It is an arithmetic number, because the mean of its divisors is an integer number (375239362941).

Almost surely, 2^{2001212012158} is an apocalyptic number.

2001212012158 is a deficient number, since it is larger than the sum of its proper divisors (1000702891370).

2001212012158 is a wasteful number, since it uses less digits than its factorization.

2001212012158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32295098.

The product of its (nonzero) digits is 640, while the sum is 25.

The spelling of 2001212012158 in words is "two trillion, one billion, two hundred twelve million, twelve thousand, one hundred fifty-eight".