1020120121011 has 8 divisors (see below), whose sum is σ = 1362930346944. Its totient is φ = 678694987880.

The previous prime is 1020120120989. The next prime is 1020120121021. The reversal of 1020120121011 is 1101210210201.

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 1020120121011 - 2⁵ = 1020120120979 is a prime.

It is a super-2 number, since 2×1020120121011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020120121021) 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, 346271481 + ... + 346274426.

It is an arithmetic number, because the mean of its divisors is an integer number (170366293368).

Almost surely, 2^{1020120121011} is an apocalyptic number.

1020120121011 is a deficient number, since it is larger than the sum of its proper divisors (342810225933).

1020120121011 is an equidigital number, since it uses as much as digits as its factorization.

1020120121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692546401.

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

Adding to 1020120121011 its reverse (1101210210201), we get a palindrome (2121330331212).

The spelling of 1020120121011 in words is "one trillion, twenty billion, one hundred twenty million, one hundred twenty-one thousand, eleven".