211021020100121 has 16 divisors (see below), whose sum is σ = 265504822154880. Its totient is φ = 162923413582080.

The previous prime is 211021020100117. The next prime is 211021020100139. The reversal of 211021020100121 is 121001020120112.

It is a cyclic number.

It is not a de Polignac number, because 211021020100121 - 2² = 211021020100117 is a prime.

It is a super-4 number, since 4×211021020100121⁴ (a number of 58 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211021020100096 and 211021020100105.

It is not an unprimeable number, because it can be changed into a prime (211021020100141) 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, 12571242656 + ... + 12571259441.

It is an arithmetic number, because the mean of its divisors is an integer number (16594051384680).

Almost surely, 2^{211021020100121} is an apocalyptic number.

It is an amenable number.

211021020100121 is a deficient number, since it is larger than the sum of its proper divisors (54483802054759).

211021020100121 is a wasteful number, since it uses less digits than its factorization.

211021020100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25142502224.

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

Adding to 211021020100121 its reverse (121001020120112), we get a palindrome (332022040220233).

The spelling of 211021020100121 in words is "two hundred eleven trillion, twenty-one billion, twenty million, one hundred thousand, one hundred twenty-one".