2021011121986 has 16 divisors (see below), whose sum is σ = 3230626477824. Its totient is φ = 946005205024.

The previous prime is 2021011121953. The next prime is 2021011121989. The reversal of 2021011121986 is 6891211101202.

It is a super-2 number, since 2×2021011121986² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021011121989) 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, 467391715 + ... + 467396038.

It is an arithmetic number, because the mean of its divisors is an integer number (201914154864).

Almost surely, 2^{2021011121986} is an apocalyptic number.

2021011121986 is a deficient number, since it is larger than the sum of its proper divisors (1209615355838).

2021011121986 is a wasteful number, since it uses less digits than its factorization.

2021011121986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934787825.

The product of its (nonzero) digits is 3456, while the sum is 34.

The spelling of 2021011121986 in words is "two trillion, twenty-one billion, eleven million, one hundred twenty-one thousand, nine hundred eighty-six".