210020220122021 has 16 divisors (see below), whose sum is σ = 224076955151808. Its totient is φ = 196152731923200.

The previous prime is 210020220122017. The next prime is 210020220122161. The reversal of 210020220122021 is 120221022020012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210020220122021 - 2² = 210020220122017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210020220122221) 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, 99083891 + ... + 101181311.

It is an arithmetic number, because the mean of its divisors is an integer number (14004809696988).

Almost surely, 2^{210020220122021} is an apocalyptic number.

It is an amenable number.

210020220122021 is a deficient number, since it is larger than the sum of its proper divisors (14056735029787).

210020220122021 is a wasteful number, since it uses less digits than its factorization.

210020220122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142532.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210020220122021 its reverse (120221022020012), we get a palindrome (330241242142033).

The spelling of 210020220122021 in words is "two hundred ten trillion, twenty billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".