1210221022021 has 16 divisors (see below), whose sum is σ = 1328761712448. Its totient is φ = 1093101609600.

The previous prime is 1210221022019. The next prime is 1210221022051. The reversal of 1210221022021 is 1202201220121.

It is a happy number.

It is not a de Polignac number, because 1210221022021 - 2¹ = 1210221022019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210221021986 and 1210221022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210221022051) 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, 28704126 + ... + 28746256.

It is an arithmetic number, because the mean of its divisors is an integer number (83047607028).

Almost surely, 2^{1210221022021} is an apocalyptic number.

1210221022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210221022021 is a deficient number, since it is larger than the sum of its proper divisors (118540690427).

1210221022021 is a wasteful number, since it uses less digits than its factorization.

1210221022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58932.

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

Adding to 1210221022021 its reverse (1202201220121), we get a palindrome (2412422242142).

The spelling of 1210221022021 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, twenty-two thousand, twenty-one".