21012121001022 has 16 divisors (see below), whose sum is σ = 42024291300480. Its totient is φ = 7004032117272.

The previous prime is 21012121000963. The next prime is 21012121001033. The reversal of 21012121001022 is 22010012121012.

It is a junction number, because it is equal to n+sod(n) for n = 21012121000992 and 21012121001010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5792433 + ... + 8693475.

It is an arithmetic number, because the mean of its divisors is an integer number (2626518206280).

Almost surely, 2^{21012121001022} is an apocalyptic number.

21012121001022 is an abundant number, since it is smaller than the sum of its proper divisors (21012170299458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012121001022 is a wasteful number, since it uses less digits than its factorization.

21012121001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108207.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21012121001022 its reverse (22010012121012), we get a palindrome (43022133122034).

The spelling of 21012121001022 in words is "twenty-one trillion, twelve billion, one hundred twenty-one million, one thousand, twenty-two".