210001010021121 has 16 divisors (see below), whose sum is σ = 305465655886848. Its totient is φ = 127269322194000.

The previous prime is 210001010021119. The next prime is 210001010021167. The reversal of 210001010021121 is 121120010100012.

It is not a de Polignac number, because 210001010021121 - 2¹ = 210001010021119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210001010021097 and 210001010021106.

It is not an unprimeable number, because it can be changed into a prime (210001010021821) 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, 99368805 + ... + 101460146.

It is an arithmetic number, because the mean of its divisors is an integer number (19091603492928).

Almost surely, 2^{210001010021121} is an apocalyptic number.

It is an amenable number.

210001010021121 is a deficient number, since it is larger than the sum of its proper divisors (95464645865727).

210001010021121 is a wasteful number, since it uses less digits than its factorization.

210001010021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200860652.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 210001010021121 its reverse (121120010100012), we get a palindrome (331121020121133).

The spelling of 210001010021121 in words is "two hundred ten trillion, one billion, ten million, twenty-one thousand, one hundred twenty-one".