2012210212021 has 2 divisors, whose sum is σ = 2012210212022. Its totient is φ = 2012210212020.

The previous prime is 2012210212007. The next prime is 2012210212037. The reversal of 2012210212021 is 1202120122102.

It is a happy number.

It is an a-pointer prime, because the next prime (2012210212037) can be obtained adding 2012210212021 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1116433144996 + 895777067025 = 1056614^2 + 946455^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012210212021 - 2¹⁵ = 2012210179253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012210211986 and 2012210212004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012210612021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006105106010 + 1006105106011.

It is an arithmetic number, because the mean of its divisors is an integer number (1006105106011).

Almost surely, 2^{2012210212021} is an apocalyptic number.

It is an amenable number.

2012210212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012210212021 is an equidigital number, since it uses as much as digits as its factorization.

2012210212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2012210212021 its reverse (1202120122102), we get a palindrome (3214330334123).

It can be divided in two parts, 20122102 and 12021, that multiplied together give a palindrome (241887788142).

The spelling of 2012210212021 in words is "two trillion, twelve billion, two hundred ten million, two hundred twelve thousand, twenty-one".