1021221201011 has 32 divisors (see below), whose sum is σ = 1144606256640. Its totient is φ = 903065068800.

The previous prime is 1021221200977. The next prime is 1021221201053. The reversal of 1021221201011 is 1101021221201.

It is a cyclic number.

It is not a de Polignac number, because 1021221201011 - 2¹⁰ = 1021221199987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021221204011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384060800 + ... + 384063458.

It is an arithmetic number, because the mean of its divisors is an integer number (35768945520).

Almost surely, 2^{1021221201011} is an apocalyptic number.

1021221201011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1021221201011 is a deficient number, since it is larger than the sum of its proper divisors (123385055629).

1021221201011 is a wasteful number, since it uses less digits than its factorization.

1021221201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907.

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

Adding to 1021221201011 its reverse (1101021221201), we get a palindrome (2122242422212).

The spelling of 1021221201011 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred one thousand, eleven".