1021012210121 has 8 divisors (see below), whose sum is σ = 1022432473800. Its totient is φ = 1019592154240.

The previous prime is 1021012210103. The next prime is 1021012210177. The reversal of 1021012210121 is 1210122101201.

It can be written as a sum of positive squares in 4 ways, for example, as 82477521721 + 938534688400 = 287189^2 + 968780^2 .

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 1021012210121 - 2²² = 1021008015817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021012210096 and 1021012210105.

It is not an unprimeable number, because it can be changed into a prime (1021012213121) 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, 11575775 + ... + 11663643.

It is an arithmetic number, because the mean of its divisors is an integer number (127804059225).

Almost surely, 2^{1021012210121} is an apocalyptic number.

It is an amenable number.

1021012210121 is a deficient number, since it is larger than the sum of its proper divisors (1420263679).

1021012210121 is an equidigital number, since it uses as much as digits as its factorization.

1021012210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103899.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021012210121 its reverse (1210122101201), we get a palindrome (2231134311322).

The spelling of 1021012210121 in words is "one trillion, twenty-one billion, twelve million, two hundred ten thousand, one hundred twenty-one".