1011211020121 has 8 divisors (see below), whose sum is σ = 1055845010880. Its totient is φ = 966632720592.

The previous prime is 1011211020049. The next prime is 1011211020139. The reversal of 1011211020121 is 1210201121101.

It is a happy number.

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 1011211020121 - 2¹³ = 1011211011929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011211020151) 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, 13885690 + ... + 13958323.

It is an arithmetic number, because the mean of its divisors is an integer number (131980626360).

Almost surely, 2^{1011211020121} is an apocalyptic number.

It is an amenable number.

1011211020121 is a deficient number, since it is larger than the sum of its proper divisors (44633990759).

1011211020121 is a wasteful number, since it uses less digits than its factorization.

1011211020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27845615.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1011211020121 its reverse (1210201121101), we get a palindrome (2221412141222).

The spelling of 1011211020121 in words is "one trillion, eleven billion, two hundred eleven million, twenty thousand, one hundred twenty-one".