1021100210021 has 8 divisors (see below), whose sum is σ = 1021887394560. Its totient is φ = 1020313136128.

The previous prime is 1021100210017. The next prime is 1021100210087. The reversal of 1021100210021 is 1200120011201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021100210021 - 2² = 1021100210017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021100209984 and 1021100210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100210621) 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, 32947685 + ... + 32978661.

It is an arithmetic number, because the mean of its divisors is an integer number (127735924320).

Almost surely, 2^{1021100210021} is an apocalyptic number.

It is an amenable number.

1021100210021 is a deficient number, since it is larger than the sum of its proper divisors (787184539).

1021100210021 is a wasteful number, since it uses less digits than its factorization.

1021100210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55323.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021100210021 its reverse (1200120011201), we get a palindrome (2221220221222).

The spelling of 1021100210021 in words is "one trillion, twenty-one billion, one hundred million, two hundred ten thousand, twenty-one".