1211101010121 has 8 divisors (see below), whose sum is σ = 1658444626624. Its totient is φ = 785579033520.

The previous prime is 1211101010003. The next prime is 1211101010123. The reversal of 1211101010121 is 1210101011121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211101010121 - 2⁹ = 1211101009609 is a prime.

It is a super-2 number, since 2×1211101010121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211101010097 and 1211101010106.

It is not an unprimeable number, because it can be changed into a prime (1211101010123) 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, 5455409845 + ... + 5455410066.

It is an arithmetic number, because the mean of its divisors is an integer number (207305578328).

Almost surely, 2^{1211101010121} is an apocalyptic number.

It is an amenable number.

1211101010121 is a deficient number, since it is larger than the sum of its proper divisors (447343616503).

1211101010121 is a wasteful number, since it uses less digits than its factorization.

1211101010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10910819951.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1211101010121 its reverse (1210101011121), we get a palindrome (2421202021242).

The spelling of 1211101010121 in words is "one trillion, two hundred eleven billion, one hundred one million, ten thousand, one hundred twenty-one".