1911020002121 has 8 divisors (see below), whose sum is σ = 1924811343840. Its totient is φ = 1897229274912.

The previous prime is 1911020002091. The next prime is 1911020002187. The reversal of 1911020002121 is 1212000201191.

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

It is a cyclic number.

It is not a de Polignac number, because 1911020002121 - 2³⁸ = 1636142095177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1911020002093 and 1911020002102.

It is not an unprimeable number, because it can be changed into a prime (1911020004121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7435661 + ... + 7688373.

It is an arithmetic number, because the mean of its divisors is an integer number (240601417980).

Almost surely, 2^{1911020002121} is an apocalyptic number.

It is an amenable number.

1911020002121 is a deficient number, since it is larger than the sum of its proper divisors (13791341719).

1911020002121 is a wasteful number, since it uses less digits than its factorization.

1911020002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307255.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1911020002121 in words is "one trillion, nine hundred eleven billion, twenty million, two thousand, one hundred twenty-one".