212010011221021 has 16 divisors (see below), whose sum is σ = 238255579658880. Its totient is φ = 187184759065920.

The previous prime is 212010011220983. The next prime is 212010011221079. The reversal of 212010011221021 is 120122110010212.

It is a cyclic number.

It is not a de Polignac number, because 212010011221021 - 2²³ = 212010002832413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212010011220986 and 212010011221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010011221721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8212170 + ... + 22168891.

It is an arithmetic number, because the mean of its divisors is an integer number (14890973728680).

Almost surely, 2^{212010011221021} is an apocalyptic number.

It is an amenable number.

212010011221021 is a deficient number, since it is larger than the sum of its proper divisors (26245568437859).

212010011221021 is a wasteful number, since it uses less digits than its factorization.

212010011221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30404436.

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

Adding to 212010011221021 its reverse (120122110010212), we get a palindrome (332132121231233).

The spelling of 212010011221021 in words is "two hundred twelve trillion, ten billion, eleven million, two hundred twenty-one thousand, twenty-one".