1210122022021 has 4 divisors (see below), whose sum is σ = 1320133114944. Its totient is φ = 1100110929100.

The previous prime is 1210122022013. The next prime is 1210122022037. The reversal of 1210122022021 is 1202202210121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1210122022021 - 2³ = 1210122022013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210122021986 and 1210122022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210122022321) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 55005546445 + ... + 55005546466.

It is an arithmetic number, because the mean of its divisors is an integer number (330033278736).

Almost surely, 2^{1210122022021} is an apocalyptic number.

1210122022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210122022021 is a deficient number, since it is larger than the sum of its proper divisors (110011092923).

1210122022021 is a wasteful number, since it uses less digits than its factorization.

1210122022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110011092922.

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

Adding to 1210122022021 its reverse (1202202210121), we get a palindrome (2412324232142).

The spelling of 1210122022021 in words is "one trillion, two hundred ten billion, one hundred twenty-two million, twenty-two thousand, twenty-one".