1201021021011 has 32 divisors (see below), whose sum is σ = 1889756725248. Its totient is φ = 663950581920.

The previous prime is 1201021021009. The next prime is 1201021021037. The reversal of 1201021021011 is 1101201201021.

It is not a de Polignac number, because 1201021021011 - 2¹ = 1201021021009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201021021061) 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, 1797160 + ... + 2373146.

It is an arithmetic number, because the mean of its divisors is an integer number (59054897664).

Almost surely, 2^{1201021021011} is an apocalyptic number.

1201021021011 is a deficient number, since it is larger than the sum of its proper divisors (688735704237).

1201021021011 is a wasteful number, since it uses less digits than its factorization.

1201021021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579231.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201021021011 its reverse (1101201201021), we get a palindrome (2302222222032).

The spelling of 1201021021011 in words is "one trillion, two hundred one billion, twenty-one million, twenty-one thousand, eleven".