211100010022021 has 4 divisors (see below), whose sum is σ = 212762214825472. Its totient is φ = 209437805218572.

The previous prime is 211100010022003. The next prime is 211100010022051. The reversal of 211100010022021 is 120220010001112.

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 211100010022021 - 2⁴¹ = 208900986766469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211100010021992 and 211100010022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100010022051) 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, 831102401535 + ... + 831102401788.

It is an arithmetic number, because the mean of its divisors is an integer number (53190553706368).

Almost surely, 2^{211100010022021} is an apocalyptic number.

It is an amenable number.

211100010022021 is a deficient number, since it is larger than the sum of its proper divisors (1662204803451).

211100010022021 is a wasteful number, since it uses less digits than its factorization.

211100010022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662204803450.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211100010022021 its reverse (120220010001112), we get a palindrome (331320020023133).

The spelling of 211100010022021 in words is "two hundred eleven trillion, one hundred billion, ten million, twenty-two thousand, twenty-one".