1012122220021 has 16 divisors (see below), whose sum is σ = 1132283325888. Its totient is φ = 896746435200.

The previous prime is 1012122219991. The next prime is 1012122220069. The reversal of 1012122220021 is 1200222212101.

It is a happy number.

It is not a de Polignac number, because 1012122220021 - 2⁹ = 1012122219509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012122219977 and 1012122220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012122280021) 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, 2124970 + ... + 2557291.

It is an arithmetic number, because the mean of its divisors is an integer number (70767707868).

Almost surely, 2^{1012122220021} is an apocalyptic number.

1012122220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012122220021 is a deficient number, since it is larger than the sum of its proper divisors (120161105867).

1012122220021 is a wasteful number, since it uses less digits than its factorization.

1012122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682772.

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

Adding to 1012122220021 its reverse (1200222212101), we get a palindrome (2212344432122).

The spelling of 1012122220021 in words is "one trillion, twelve billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".