2120121011987 has 8 divisors (see below), whose sum is σ = 2392613054640. Its totient is φ = 1860921264160.

The previous prime is 2120121011927. The next prime is 2120121011993. The reversal of 2120121011987 is 7891101210212.

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 2120121011987 - 2¹² = 2120121007891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120121011927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3323073368 + ... + 3323074005.

It is an arithmetic number, because the mean of its divisors is an integer number (299076631830).

Almost surely, 2^{2120121011987} is an apocalyptic number.

2120121011987 is a deficient number, since it is larger than the sum of its proper divisors (272492042653).

2120121011987 is a wasteful number, since it uses less digits than its factorization.

2120121011987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6646147413.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 2120121011987 in words is "two trillion, one hundred twenty billion, one hundred twenty-one million, eleven thousand, nine hundred eighty-seven".