210120101021121 has 16 divisors (see below), whose sum is σ = 288346440941568. Its totient is φ = 136045808514000.

The previous prime is 210120101021111. The next prime is 210120101021203. The reversal of 210120101021121 is 121120101021012.

It is a happy number.

It is not a de Polignac number, because 210120101021121 - 2¹⁹ = 210120100496833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210120101021121.

It is not an unprimeable number, because it can be changed into a prime (210120101021111) 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, 7361771905 + ... + 7361800446.

It is an arithmetic number, because the mean of its divisors is an integer number (18021652558848).

Almost surely, 2^{210120101021121} is an apocalyptic number.

It is an amenable number.

210120101021121 is a deficient number, since it is larger than the sum of its proper divisors (78226339920447).

210120101021121 is a wasteful number, since it uses less digits than its factorization.

210120101021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14723572492.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210120101021121 its reverse (121120101021012), we get a palindrome (331240202042133).

The spelling of 210120101021121 in words is "two hundred ten trillion, one hundred twenty billion, one hundred one million, twenty-one thousand, one hundred twenty-one".