1201121020011 has 32 divisors (see below), whose sum is σ = 1789025660928. Its totient is φ = 710501732640.

The previous prime is 1201121020007. The next prime is 1201121020013. The reversal of 1201121020011 is 1100201211021.

It is not a de Polignac number, because 1201121020011 - 2² = 1201121020007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201121020013) 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, 1630170 + ... + 2249376.

It is an arithmetic number, because the mean of its divisors is an integer number (55907051904).

Almost surely, 2^{1201121020011} is an apocalyptic number.

1201121020011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201121020011 is a deficient number, since it is larger than the sum of its proper divisors (587904640917).

1201121020011 is a wasteful number, since it uses less digits than its factorization.

1201121020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620631.

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

Adding to 1201121020011 its reverse (1100201211021), we get a palindrome (2301322231032).

The spelling of 1201121020011 in words is "one trillion, two hundred one billion, one hundred twenty-one million, twenty thousand, eleven".