2111121022021 has 4 divisors (see below), whose sum is σ = 2303041114944. Its totient is φ = 1919200929100.

The previous prime is 2111121022001. The next prime is 2111121022033. The reversal of 2111121022021 is 1202201211112.

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 not a de Polignac number, because 2111121022021 - 2²¹ = 2111118924869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111121021986 and 2111121022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111121022001) 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, 95960046445 + ... + 95960046466.

It is an arithmetic number, because the mean of its divisors is an integer number (575760278736).

Almost surely, 2^{2111121022021} is an apocalyptic number.

It is an amenable number.

2111121022021 is a deficient number, since it is larger than the sum of its proper divisors (191920092923).

2111121022021 is a wasteful number, since it uses less digits than its factorization.

2111121022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191920092922.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111121022021 its reverse (1202201211112), we get a palindrome (3313322233133).

The spelling of 2111121022021 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, twenty-two thousand, twenty-one".