21012202112211 has 6 divisors (see below), whose sum is σ = 30350958606540. Its totient is φ = 14008134741468.

The previous prime is 21012202112183. The next prime is 21012202112261. The reversal of 21012202112211 is 11221120221012.

21012202112211 is a `hidden beast` number, since 2 + 10 + 1 + 220 + 211 + 221 + 1 = 666.

It is not a de Polignac number, because 21012202112211 - 2⁶ = 21012202112147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012202112261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1167344561781 + ... + 1167344561798.

It is an arithmetic number, because the mean of its divisors is an integer number (5058493101090).

Almost surely, 2^{21012202112211} is an apocalyptic number.

21012202112211 is a deficient number, since it is larger than the sum of its proper divisors (9338756494329).

21012202112211 is a wasteful number, since it uses less digits than its factorization.

21012202112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334689123585 (or 2334689123582 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21012202112211 its reverse (11221120221012), we get a palindrome (32233322333223).

The spelling of 21012202112211 in words is "twenty-one trillion, twelve billion, two hundred two million, one hundred twelve thousand, two hundred eleven".