2021011102121 has 4 divisors (see below), whose sum is σ = 2204739384144. Its totient is φ = 1837282820100.

The previous prime is 2021011102111. The next prime is 2021011102157. The reversal of 2021011102121 is 1212011101202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021011102121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021011102096 and 2021011102105.

It is not an unprimeable number, because it can be changed into a prime (2021011102111) 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, 91864140995 + ... + 91864141016.

It is an arithmetic number, because the mean of its divisors is an integer number (551184846036).

Almost surely, 2^{2021011102121} is an apocalyptic number.

It is an amenable number.

2021011102121 is a deficient number, since it is larger than the sum of its proper divisors (183728282023).

2021011102121 is a wasteful number, since it uses less digits than its factorization.

2021011102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183728282022.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2021011102121 its reverse (1212011101202), we get a palindrome (3233022203323).

The spelling of 2021011102121 in words is "two trillion, twenty-one billion, eleven million, one hundred two thousand, one hundred twenty-one".