210020011021 has 8 divisors (see below), whose sum is σ = 220824229824. Its totient is φ = 199355201760.

The previous prime is 210020010989. The next prime is 210020011027. The reversal of 210020011021 is 120110020012.

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 210020011021 - 2⁵ = 210020010989 is a prime.

It is a super-2 number, since 2×210020011021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210020010989 and 210020011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020011027) 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, 34849296 + ... + 34855321.

It is an arithmetic number, because the mean of its divisors is an integer number (27603028728).

Almost surely, 2^210020011021 is an apocalyptic number.

It is an amenable number.

210020011021 is a deficient number, since it is larger than the sum of its proper divisors (10804218803).

210020011021 is a wasteful number, since it uses less digits than its factorization.

210020011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69704771.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210020011021 its reverse (120110020012), we get a palindrome (330130031033).

The spelling of 210020011021 in words is "two hundred ten billion, twenty million, eleven thousand, twenty-one".