1020012121211 has 4 divisors (see below), whose sum is σ = 1020138259152. Its totient is φ = 1019885983272.

The previous prime is 1020012121207. The next prime is 1020012121259. The reversal of 1020012121211 is 1121212100201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1020012121211 - 2² = 1020012121207 is a prime.

It is a super-2 number, since 2×1020012121211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020012121111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63056840 + ... + 63073013.

It is an arithmetic number, because the mean of its divisors is an integer number (255034564788).

Almost surely, 2^{1020012121211} is an apocalyptic number.

1020012121211 is a deficient number, since it is larger than the sum of its proper divisors (126137941).

1020012121211 is an equidigital number, since it uses as much as digits as its factorization.

1020012121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126137940.

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

Adding to 1020012121211 its reverse (1121212100201), we get a palindrome (2141224221412).

The spelling of 1020012121211 in words is "one trillion, twenty billion, twelve million, one hundred twenty-one thousand, two hundred eleven".