10121012121211 has 4 divisors (see below), whose sum is σ = 10125833949000. Its totient is φ = 10116190293424.

The previous prime is 10121012121193. The next prime is 10121012121221. The reversal of 10121012121211 is 11212121012101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10121012121211 - 2¹⁹ = 10121011596923 is a prime.

It is a super-2 number, since 2×10121012121211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10121012121221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2410910746 + ... + 2410914943.

It is an arithmetic number, because the mean of its divisors is an integer number (2531458487250).

Almost surely, 2^{10121012121211} is an apocalyptic number.

10121012121211 is a deficient number, since it is larger than the sum of its proper divisors (4821827789).

10121012121211 is an equidigital number, since it uses as much as digits as its factorization.

10121012121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821827788.

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

Adding to 10121012121211 its reverse (11212121012101), we get a palindrome (21333133133312).

The spelling of 10121012121211 in words is "ten trillion, one hundred twenty-one billion, twelve million, one hundred twenty-one thousand, two hundred eleven".