1021102220021 has 8 divisors (see below), whose sum is σ = 1135121078784. Its totient is φ = 912150866160.

The previous prime is 1021102220009. The next prime is 1021102220059. The reversal of 1021102220021 is 1200222011201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021102220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021102219978 and 1021102220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021102120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1266875801 + ... + 1266876606.

It is an arithmetic number, because the mean of its divisors is an integer number (141890134848).

Almost surely, 2^{1021102220021} is an apocalyptic number.

It is an amenable number.

1021102220021 is a deficient number, since it is larger than the sum of its proper divisors (114018858763).

1021102220021 is a wasteful number, since it uses less digits than its factorization.

1021102220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533752451.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021102220021 its reverse (1200222011201), we get a palindrome (2221324231222).

The spelling of 1021102220021 in words is "one trillion, twenty-one billion, one hundred two million, two hundred twenty thousand, twenty-one".