679011212121 has 16 divisors (see below), whose sum is σ = 994281220800. Its totient is φ = 408760051520.

The previous prime is 679011212107. The next prime is 679011212147. The reversal of 679011212121 is 121212110976.

679011212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 679011212121 - 2³⁰ = 677937470297 is a prime.

It is a super-2 number, since 2×679011212121² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (679011213121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69042390 + ... + 69052223.

It is an arithmetic number, because the mean of its divisors is an integer number (62142576300).

Almost surely, 2^679011212121 is an apocalyptic number.

It is an amenable number.

679011212121 is a deficient number, since it is larger than the sum of its proper divisors (315270008679).

679011212121 is a wasteful number, since it uses less digits than its factorization.

679011212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138094776.

The product of its (nonzero) digits is 3024, while the sum is 33.

The spelling of 679011212121 in words is "six hundred seventy-nine billion, eleven million, two hundred twelve thousand, one hundred twenty-one".